diff -r 000000000000 -r 6474c204b198 browser/base/content/browser.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/browser.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,7392 @@
+# -*- Mode: javascript; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+let Ci = Components.interfaces;
+let Cu = Components.utils;
+
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
+Cu.import("resource://gre/modules/NotificationDB.jsm");
+Cu.import("resource:///modules/RecentWindow.jsm");
+Cu.import("resource://gre/modules/WindowsPrefSync.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "BrowserUtils",
+                                  "resource://gre/modules/BrowserUtils.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "Task",
+                                  "resource://gre/modules/Task.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "CharsetMenu",
+                                  "resource://gre/modules/CharsetMenu.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "ShortcutUtils",
+                                  "resource://gre/modules/ShortcutUtils.jsm");
+
+const nsIWebNavigation = Ci.nsIWebNavigation;
+
+var gLastBrowserCharset = null;
+var gPrevCharset = null;
+var gProxyFavIcon = null;
+var gLastValidURLStr = "";
+var gInPrintPreviewMode = false;
+var gContextMenu = null; // nsContextMenu instance
+var gMultiProcessBrowser = false;
+
+#ifndef XP_MACOSX
+var gEditUIVisible = true;
+#endif
+
+[
+  ["gBrowser",            "content"],
+  ["gNavToolbox",         "navigator-toolbox"],
+  ["gURLBar",             "urlbar"],
+  ["gNavigatorBundle",    "bundle_browser"]
+].forEach(function (elementGlobal) {
+  var [name, id] = elementGlobal;
+  window.__defineGetter__(name, function () {
+    var element = document.getElementById(id);
+    if (!element)
+      return null;
+    delete window[name];
+    return window[name] = element;
+  });
+  window.__defineSetter__(name, function (val) {
+    delete window[name];
+    return window[name] = val;
+  });
+});
+
+// Smart getter for the findbar.  If you don't wish to force the creation of
+// the findbar, check gFindBarInitialized first.
+
+this.__defineGetter__("gFindBar", function() {
+  return window.gBrowser.getFindBar();
+});
+
+this.__defineGetter__("gFindBarInitialized", function() {
+  return window.gBrowser.isFindBarInitialized();
+});
+
+XPCOMUtils.defineLazyGetter(this, "gPrefService", function() {
+  return Services.prefs;
+});
+
+this.__defineGetter__("AddonManager", function() {
+  let tmp = {};
+  Cu.import("resource://gre/modules/AddonManager.jsm", tmp);
+  return this.AddonManager = tmp.AddonManager;
+});
+this.__defineSetter__("AddonManager", function (val) {
+  delete this.AddonManager;
+  return this.AddonManager = val;
+});
+
+XPCOMUtils.defineLazyModuleGetter(this, "PluralForm",
+  "resource://gre/modules/PluralForm.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "TelemetryStopwatch",
+  "resource://gre/modules/TelemetryStopwatch.jsm");
+
+XPCOMUtils.defineLazyGetter(this, "gCustomizeMode", function() {
+  let scope = {};
+  Cu.import("resource:///modules/CustomizeMode.jsm", scope);
+  return new scope.CustomizeMode(window);
+});
+
+#ifdef MOZ_SERVICES_SYNC
+XPCOMUtils.defineLazyModuleGetter(this, "Weave",
+  "resource://services-sync/main.js");
+#endif
+
+XPCOMUtils.defineLazyGetter(this, "PopupNotifications", function () {
+  let tmp = {};
+  Cu.import("resource://gre/modules/PopupNotifications.jsm", tmp);
+  try {
+    return new tmp.PopupNotifications(gBrowser,
+                                      document.getElementById("notification-popup"),
+                                      document.getElementById("notification-popup-box"));
+  } catch (ex) {
+    Cu.reportError(ex);
+    return null;
+  }
+});
+
+XPCOMUtils.defineLazyGetter(this, "DeveloperToolbar", function() {
+  let tmp = {};
+  Cu.import("resource:///modules/devtools/DeveloperToolbar.jsm", tmp);
+  return new tmp.DeveloperToolbar(window, document.getElementById("developer-toolbar"));
+});
+
+XPCOMUtils.defineLazyGetter(this, "BrowserToolboxProcess", function() {
+  let tmp = {};
+  Cu.import("resource:///modules/devtools/ToolboxProcess.jsm", tmp);
+  return tmp.BrowserToolboxProcess;
+});
+
+XPCOMUtils.defineLazyModuleGetter(this, "Social",
+  "resource:///modules/Social.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "PageThumbs",
+  "resource://gre/modules/PageThumbs.jsm");
+
+#ifdef MOZ_SAFE_BROWSING
+XPCOMUtils.defineLazyModuleGetter(this, "SafeBrowsing",
+  "resource://gre/modules/SafeBrowsing.jsm");
+#endif
+
+XPCOMUtils.defineLazyModuleGetter(this, "gBrowserNewTabPreloader",
+  "resource:///modules/BrowserNewTabPreloader.jsm", "BrowserNewTabPreloader");
+
+XPCOMUtils.defineLazyModuleGetter(this, "gCustomizationTabPreloader",
+  "resource:///modules/CustomizationTabPreloader.jsm", "CustomizationTabPreloader");
+
+XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
+  "resource://gre/modules/PrivateBrowsingUtils.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "Translation",
+  "resource:///modules/translation/Translation.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "SitePermissions",
+  "resource:///modules/SitePermissions.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "SessionStore",
+  "resource:///modules/sessionstore/SessionStore.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "fxAccounts",
+  "resource://gre/modules/FxAccounts.jsm");
+
+#ifdef MOZ_CRASHREPORTER
+XPCOMUtils.defineLazyModuleGetter(this, "TabCrashReporter",
+  "resource:///modules/TabCrashReporter.jsm");
+#endif
+
+let gInitialPages = [
+  "about:blank",
+  "about:newtab",
+  "about:home",
+  "about:privatebrowsing",
+  "about:welcomeback",
+  "about:sessionrestore"
+];
+
+#include browser-addons.js
+#include browser-customization.js
+#include browser-feeds.js
+#include browser-fullScreen.js
+#include browser-fullZoom.js
+#include browser-places.js
+#include browser-plugins.js
+#include browser-safebrowsing.js
+#include browser-social.js
+#include browser-tabPreviews.js
+#include browser-tabview.js
+#include browser-thumbnails.js
+#include browser-webrtcUI.js
+#include browser-gestureSupport.js
+
+#ifdef MOZ_DATA_REPORTING
+#include browser-data-submission-info-bar.js
+#endif
+
+#ifdef MOZ_SERVICES_SYNC
+#include browser-syncui.js
+#endif
+
+#include browser-fxaccounts.js
+
+XPCOMUtils.defineLazyGetter(this, "Win7Features", function () {
+#ifdef XP_WIN
+  // Bug 666808 - AeroPeek support for e10s
+  if (gMultiProcessBrowser)
+    return null;
+
+  const WINTASKBAR_CONTRACTID = "@mozilla.org/windows-taskbar;1";
+  if (WINTASKBAR_CONTRACTID in Cc &&
+      Cc[WINTASKBAR_CONTRACTID].getService(Ci.nsIWinTaskbar).available) {
+    let AeroPeek = Cu.import("resource:///modules/WindowsPreviewPerTab.jsm", {}).AeroPeek;
+    return {
+      onOpenWindow: function () {
+        AeroPeek.onOpenWindow(window);
+      },
+      onCloseWindow: function () {
+        AeroPeek.onCloseWindow(window);
+      }
+    };
+  }
+#endif
+  return null;
+});
+
+#ifdef MOZ_CRASHREPORTER
+XPCOMUtils.defineLazyServiceGetter(this, "gCrashReporter",
+                                   "@mozilla.org/xre/app-info;1",
+                                   "nsICrashReporter");
+#endif
+
+XPCOMUtils.defineLazyGetter(this, "PageMenu", function() {
+  let tmp = {};
+  Cu.import("resource://gre/modules/PageMenu.jsm", tmp);
+  return new tmp.PageMenu();
+});
+
+/**
+* We can avoid adding multiple load event listeners and save some time by adding
+* one listener that calls all real handlers.
+*/
+function pageShowEventHandlers(persisted) {
+  charsetLoadListener();
+  XULBrowserWindow.asyncUpdateUI();
+
+  // The PluginClickToPlay events are not fired when navigating using the
+  // BF cache. |persisted| is true when the page is loaded from the
+  // BF cache, so this code reshows the notification if necessary.
+  if (persisted)
+    gPluginHandler.reshowClickToPlayNotification();
+}
+
+function UpdateBackForwardCommands(aWebNavigation) {
+  var backBroadcaster = document.getElementById("Browser:Back");
+  var forwardBroadcaster = document.getElementById("Browser:Forward");
+
+  // Avoid setting attributes on broadcasters if the value hasn't changed!
+  // Remember, guys, setting attributes on elements is expensive!  They
+  // get inherited into anonymous content, broadcast to other widgets, etc.!
+  // Don't do it if the value hasn't changed! - dwh
+
+  var backDisabled = backBroadcaster.hasAttribute("disabled");
+  var forwardDisabled = forwardBroadcaster.hasAttribute("disabled");
+  if (backDisabled == aWebNavigation.canGoBack) {
+    if (backDisabled)
+      backBroadcaster.removeAttribute("disabled");
+    else
+      backBroadcaster.setAttribute("disabled", true);
+  }
+
+  if (forwardDisabled == aWebNavigation.canGoForward) {
+    if (forwardDisabled)
+      forwardBroadcaster.removeAttribute("disabled");
+    else
+      forwardBroadcaster.setAttribute("disabled", true);
+  }
+}
+
+/**
+ * Click-and-Hold implementation for the Back and Forward buttons
+ * XXXmano: should this live in toolbarbutton.xml?
+ */
+function SetClickAndHoldHandlers() {
+  var timer;
+
+  function openMenu(aButton) {
+    cancelHold(aButton);
+    aButton.firstChild.hidden = false;
+    aButton.open = true;
+  }
+
+  function mousedownHandler(aEvent) {
+    if (aEvent.button != 0 ||
+        aEvent.currentTarget.open ||
+        aEvent.currentTarget.disabled)
+      return;
+
+    // Prevent the menupopup from opening immediately
+    aEvent.currentTarget.firstChild.hidden = true;
+
+    aEvent.currentTarget.addEventListener("mouseout", mouseoutHandler, false);
+    aEvent.currentTarget.addEventListener("mouseup", mouseupHandler, false);
+    timer = setTimeout(openMenu, 500, aEvent.currentTarget);
+  }
+
+  function mouseoutHandler(aEvent) {
+    let buttonRect = aEvent.currentTarget.getBoundingClientRect();
+    if (aEvent.clientX >= buttonRect.left &&
+        aEvent.clientX <= buttonRect.right &&
+        aEvent.clientY >= buttonRect.bottom)
+      openMenu(aEvent.currentTarget);
+    else
+      cancelHold(aEvent.currentTarget);
+  }
+
+  function mouseupHandler(aEvent) {
+    cancelHold(aEvent.currentTarget);
+  }
+
+  function cancelHold(aButton) {
+    clearTimeout(timer);
+    aButton.removeEventListener("mouseout", mouseoutHandler, false);
+    aButton.removeEventListener("mouseup", mouseupHandler, false);
+  }
+
+  function clickHandler(aEvent) {
+    if (aEvent.button == 0 &&
+        aEvent.target == aEvent.currentTarget &&
+        !aEvent.currentTarget.open &&
+        !aEvent.currentTarget.disabled) {
+      let cmdEvent = document.createEvent("xulcommandevent");
+      cmdEvent.initCommandEvent("command", true, true, window, 0,
+                                aEvent.ctrlKey, aEvent.altKey, aEvent.shiftKey,
+                                aEvent.metaKey, null);
+      aEvent.currentTarget.dispatchEvent(cmdEvent);
+    }
+  }
+
+  function _addClickAndHoldListenersOnElement(aElm) {
+    aElm.addEventListener("mousedown", mousedownHandler, true);
+    aElm.addEventListener("click", clickHandler, true);
+  }
+
+  // Bug 414797: Clone the back/forward buttons' context menu into both buttons.
+  let popup = document.getElementById("backForwardMenu").cloneNode(true);
+  popup.removeAttribute("id");
+  // Prevent the back/forward buttons' context attributes from being inherited.
+  popup.setAttribute("context", "");
+
+  let backButton = document.getElementById("back-button");
+  backButton.setAttribute("type", "menu");
+  backButton.appendChild(popup);
+  _addClickAndHoldListenersOnElement(backButton);
+
+  let forwardButton = document.getElementById("forward-button");
+  popup = popup.cloneNode(true);
+  forwardButton.setAttribute("type", "menu");
+  forwardButton.appendChild(popup);
+  _addClickAndHoldListenersOnElement(forwardButton);
+}
+
+const gSessionHistoryObserver = {
+  observe: function(subject, topic, data)
+  {
+    if (topic != "browser:purge-session-history")
+      return;
+
+    var backCommand = document.getElementById("Browser:Back");
+    backCommand.setAttribute("disabled", "true");
+    var fwdCommand = document.getElementById("Browser:Forward");
+    fwdCommand.setAttribute("disabled", "true");
+
+    // Hide session restore button on about:home
+    window.messageManager.broadcastAsyncMessage("Browser:HideSessionRestoreButton");
+
+    if (gURLBar) {
+      // Clear undo history of the URL bar
+      gURLBar.editor.transactionManager.clear()
+    }
+  }
+};
+
+/**
+ * Given a starting docshell and a URI to look up, find the docshell the URI
+ * is loaded in.
+ * @param   aDocument
+ *          A document to find instead of using just a URI - this is more specific.
+ * @param   aDocShell
+ *          The doc shell to start at
+ * @param   aSoughtURI
+ *          The URI that we're looking for
+ * @returns The doc shell that the sought URI is loaded in. Can be in
+ *          subframes.
+ */
+function findChildShell(aDocument, aDocShell, aSoughtURI) {
+  aDocShell.QueryInterface(Components.interfaces.nsIWebNavigation);
+  aDocShell.QueryInterface(Components.interfaces.nsIInterfaceRequestor);
+  var doc = aDocShell.getInterface(Components.interfaces.nsIDOMDocument);
+  if ((aDocument && doc == aDocument) ||
+      (aSoughtURI && aSoughtURI.spec == aDocShell.currentURI.spec))
+    return aDocShell;
+
+  var node = aDocShell.QueryInterface(Components.interfaces.nsIDocShellTreeItem);
+  for (var i = 0; i < node.childCount; ++i) {
+    var docShell = node.getChildAt(i);
+    docShell = findChildShell(aDocument, docShell, aSoughtURI);
+    if (docShell)
+      return docShell;
+  }
+  return null;
+}
+
+var gPopupBlockerObserver = {
+  _reportButton: null,
+
+  onReportButtonClick: function (aEvent)
+  {
+    if (aEvent.button != 0 || aEvent.target != this._reportButton)
+      return;
+
+    document.getElementById("blockedPopupOptions")
+            .openPopup(this._reportButton, "after_end", 0, 2, false, false, aEvent);
+  },
+
+  handleEvent: function (aEvent)
+  {
+    if (aEvent.originalTarget != gBrowser.selectedBrowser)
+      return;
+
+    if (!this._reportButton && gURLBar)
+      this._reportButton = document.getElementById("page-report-button");
+
+    if (!gBrowser.selectedBrowser.blockedPopups) {
+      // Hide the icon in the location bar (if the location bar exists)
+      if (gURLBar)
+        this._reportButton.hidden = true;
+      return;
+    }
+
+    if (gURLBar)
+      this._reportButton.hidden = false;
+
+    // Only show the notification again if we've not already shown it. Since
+    // notifications are per-browser, we don't need to worry about re-adding
+    // it.
+    if (!gBrowser.selectedBrowser.blockedPopups.reported) {
+      if (gPrefService.getBoolPref("privacy.popups.showBrowserMessage")) {
+        var brandBundle = document.getElementById("bundle_brand");
+        var brandShortName = brandBundle.getString("brandShortName");
+        var popupCount = gBrowser.selectedBrowser.blockedPopups.length;
+#ifdef XP_WIN
+        var popupButtonText = gNavigatorBundle.getString("popupWarningButton");
+        var popupButtonAccesskey = gNavigatorBundle.getString("popupWarningButton.accesskey");
+#else
+        var popupButtonText = gNavigatorBundle.getString("popupWarningButtonUnix");
+        var popupButtonAccesskey = gNavigatorBundle.getString("popupWarningButtonUnix.accesskey");
+#endif
+        var messageBase = gNavigatorBundle.getString("popupWarning.message");
+        var message = PluralForm.get(popupCount, messageBase)
+                                .replace("#1", brandShortName)
+                                .replace("#2", popupCount);
+
+        var notificationBox = gBrowser.getNotificationBox();
+        var notification = notificationBox.getNotificationWithValue("popup-blocked");
+        if (notification) {
+          notification.label = message;
+        }
+        else {
+          var buttons = [{
+            label: popupButtonText,
+            accessKey: popupButtonAccesskey,
+            popup: "blockedPopupOptions",
+            callback: null
+          }];
+
+          const priority = notificationBox.PRIORITY_WARNING_MEDIUM;
+          notificationBox.appendNotification(message, "popup-blocked",
+                                             "chrome://browser/skin/Info.png",
+                                             priority, buttons);
+        }
+      }
+
+      // Record the fact that we've reported this blocked popup, so we don't
+      // show it again.
+      gBrowser.selectedBrowser.blockedPopups.reported = true;
+    }
+  },
+
+  toggleAllowPopupsForSite: function (aEvent)
+  {
+    var pm = Services.perms;
+    var shouldBlock = aEvent.target.getAttribute("block") == "true";
+    var perm = shouldBlock ? pm.DENY_ACTION : pm.ALLOW_ACTION;
+    pm.add(gBrowser.currentURI, "popup", perm);
+
+    gBrowser.getNotificationBox().removeCurrentNotification();
+  },
+
+  fillPopupList: function (aEvent)
+  {
+    // XXXben - rather than using |currentURI| here, which breaks down on multi-framed sites
+    //          we should really walk the blockedPopups and create a list of "allow for <host>"
+    //          menuitems for the common subset of hosts present in the report, this will
+    //          make us frame-safe.
+    //
+    // XXXjst - Note that when this is fixed to work with multi-framed sites,
+    //          also back out the fix for bug 343772 where
+    //          nsGlobalWindow::CheckOpenAllow() was changed to also
+    //          check if the top window's location is whitelisted.
+    let browser = gBrowser.selectedBrowser;
+    var uri = browser.currentURI;
+    var blockedPopupAllowSite = document.getElementById("blockedPopupAllowSite");
+    try {
+      blockedPopupAllowSite.removeAttribute("hidden");
+
+      var pm = Services.perms;
+      if (pm.testPermission(uri, "popup") == pm.ALLOW_ACTION) {
+        // Offer an item to block popups for this site, if a whitelist entry exists
+        // already for it.
+        let blockString = gNavigatorBundle.getFormattedString("popupBlock", [uri.host || uri.spec]);
+        blockedPopupAllowSite.setAttribute("label", blockString);
+        blockedPopupAllowSite.setAttribute("block", "true");
+      }
+      else {
+        // Offer an item to allow popups for this site
+        let allowString = gNavigatorBundle.getFormattedString("popupAllow", [uri.host || uri.spec]);
+        blockedPopupAllowSite.setAttribute("label", allowString);
+        blockedPopupAllowSite.removeAttribute("block");
+      }
+    }
+    catch (e) {
+      blockedPopupAllowSite.setAttribute("hidden", "true");
+    }
+
+    if (PrivateBrowsingUtils.isWindowPrivate(window))
+      blockedPopupAllowSite.setAttribute("disabled", "true");
+    else
+      blockedPopupAllowSite.removeAttribute("disabled");
+
+    var foundUsablePopupURI = false;
+    var blockedPopups = browser.blockedPopups;
+    if (blockedPopups) {
+      for (let i = 0; i < blockedPopups.length; i++) {
+        let blockedPopup = blockedPopups[i];
+
+        // popupWindowURI will be null if the file picker popup is blocked.
+        // xxxdz this should make the option say "Show file picker" and do it (Bug 590306)
+        if (!blockedPopup.popupWindowURI)
+          continue;
+        var popupURIspec = blockedPopup.popupWindowURI;
+
+        // Sometimes the popup URI that we get back from the blockedPopup
+        // isn't useful (for instance, netscape.com's popup URI ends up
+        // being "http://www.netscape.com", which isn't really the URI of
+        // the popup they're trying to show).  This isn't going to be
+        // useful to the user, so we won't create a menu item for it.
+        if (popupURIspec == "" || popupURIspec == "about:blank" ||
+            popupURIspec == uri.spec)
+          continue;
+
+        // Because of the short-circuit above, we may end up in a situation
+        // in which we don't have any usable popup addresses to show in
+        // the menu, and therefore we shouldn't show the separator.  However,
+        // since we got past the short-circuit, we must've found at least
+        // one usable popup URI and thus we'll turn on the separator later.
+        foundUsablePopupURI = true;
+
+        var menuitem = document.createElement("menuitem");
+        var label = gNavigatorBundle.getFormattedString("popupShowPopupPrefix",
+                                                        [popupURIspec]);
+        menuitem.setAttribute("label", label);
+        menuitem.setAttribute("popupWindowURI", popupURIspec);
+        menuitem.setAttribute("popupWindowFeatures", blockedPopup.popupWindowFeatures);
+        menuitem.setAttribute("popupWindowName", blockedPopup.popupWindowName);
+        menuitem.setAttribute("oncommand", "gPopupBlockerObserver.showBlockedPopup(event);");
+        menuitem.setAttribute("popupReportIndex", i);
+        menuitem.popupReportBrowser = browser;
+        aEvent.target.appendChild(menuitem);
+      }
+    }
+
+    // Show or hide the separator, depending on whether we added any
+    // showable popup addresses to the menu.
+    var blockedPopupsSeparator =
+      document.getElementById("blockedPopupsSeparator");
+    if (foundUsablePopupURI)
+      blockedPopupsSeparator.removeAttribute("hidden");
+    else
+      blockedPopupsSeparator.setAttribute("hidden", true);
+
+    var blockedPopupDontShowMessage = document.getElementById("blockedPopupDontShowMessage");
+    var showMessage = gPrefService.getBoolPref("privacy.popups.showBrowserMessage");
+    blockedPopupDontShowMessage.setAttribute("checked", !showMessage);
+    if (aEvent.target.anchorNode.id == "page-report-button") {
+      aEvent.target.anchorNode.setAttribute("open", "true");
+      blockedPopupDontShowMessage.setAttribute("label", gNavigatorBundle.getString("popupWarningDontShowFromLocationbar"));
+    } else
+      blockedPopupDontShowMessage.setAttribute("label", gNavigatorBundle.getString("popupWarningDontShowFromMessage"));
+  },
+
+  onPopupHiding: function (aEvent) {
+    if (aEvent.target.anchorNode.id == "page-report-button")
+      aEvent.target.anchorNode.removeAttribute("open");
+
+    let item = aEvent.target.lastChild;
+    while (item && item.getAttribute("observes") != "blockedPopupsSeparator") {
+      let next = item.previousSibling;
+      item.parentNode.removeChild(item);
+      item = next;
+    }
+  },
+
+  showBlockedPopup: function (aEvent)
+  {
+    var target = aEvent.target;
+    var popupReportIndex = target.getAttribute("popupReportIndex");
+    let browser = target.popupReportBrowser;
+    browser.unblockPopup(popupReportIndex);
+  },
+
+  editPopupSettings: function ()
+  {
+    var host = "";
+    try {
+      host = gBrowser.currentURI.host;
+    }
+    catch (e) { }
+
+    var bundlePreferences = document.getElementById("bundle_preferences");
+    var params = { blockVisible   : false,
+                   sessionVisible : false,
+                   allowVisible   : true,
+                   prefilledHost  : host,
+                   permissionType : "popup",
+                   windowTitle    : bundlePreferences.getString("popuppermissionstitle"),
+                   introText      : bundlePreferences.getString("popuppermissionstext") };
+    var existingWindow = Services.wm.getMostRecentWindow("Browser:Permissions");
+    if (existingWindow) {
+      existingWindow.initWithParams(params);
+      existingWindow.focus();
+    }
+    else
+      window.openDialog("chrome://browser/content/preferences/permissions.xul",
+                        "_blank", "resizable,dialog=no,centerscreen", params);
+  },
+
+  dontShowMessage: function ()
+  {
+    var showMessage = gPrefService.getBoolPref("privacy.popups.showBrowserMessage");
+    gPrefService.setBoolPref("privacy.popups.showBrowserMessage", !showMessage);
+    gBrowser.getNotificationBox().removeCurrentNotification();
+  }
+};
+
+const gFormSubmitObserver = {
+  QueryInterface : XPCOMUtils.generateQI([Ci.nsIFormSubmitObserver]),
+
+  panel: null,
+
+  init: function()
+  {
+    this.panel = document.getElementById('invalid-form-popup');
+  },
+
+  notifyInvalidSubmit : function (aFormElement, aInvalidElements)
+  {
+    // We are going to handle invalid form submission attempt by focusing the
+    // first invalid element and show the corresponding validation message in a
+    // panel attached to the element.
+    if (!aInvalidElements.length) {
+      return;
+    }
+
+    // Don't show the popup if the current tab doesn't contain the invalid form.
+    if (gBrowser.contentDocument !=
+        aFormElement.ownerDocument.defaultView.top.document) {
+      return;
+    }
+
+    let element = aInvalidElements.queryElementAt(0, Ci.nsISupports);
+
+    if (!(element instanceof HTMLInputElement ||
+          element instanceof HTMLTextAreaElement ||
+          element instanceof HTMLSelectElement ||
+          element instanceof HTMLButtonElement)) {
+      return;
+    }
+
+    this.panel.firstChild.textContent = element.validationMessage;
+
+    element.focus();
+
+    // If the user interacts with the element and makes it valid or leaves it,
+    // we want to remove the popup.
+    // We could check for clicks but a click is already removing the popup.
+    function blurHandler() {
+      gFormSubmitObserver.panel.hidePopup();
+    };
+    function inputHandler(e) {
+      if (e.originalTarget.validity.valid) {
+        gFormSubmitObserver.panel.hidePopup();
+      } else {
+        // If the element is now invalid for a new reason, we should update the
+        // error message.
+        if (gFormSubmitObserver.panel.firstChild.textContent !=
+            e.originalTarget.validationMessage) {
+          gFormSubmitObserver.panel.firstChild.textContent =
+            e.originalTarget.validationMessage;
+        }
+      }
+    };
+    element.addEventListener("input", inputHandler, false);
+    element.addEventListener("blur", blurHandler, false);
+
+    // One event to bring them all and in the darkness bind them.
+    this.panel.addEventListener("popuphiding", function onPopupHiding(aEvent) {
+      aEvent.target.removeEventListener("popuphiding", onPopupHiding, false);
+      element.removeEventListener("input", inputHandler, false);
+      element.removeEventListener("blur", blurHandler, false);
+    }, false);
+
+    this.panel.hidden = false;
+
+    // We want to show the popup at the middle of checkbox and radio buttons
+    // and where the content begin for the other elements.
+    let offset = 0;
+    let position = "";
+
+    if (element.tagName == 'INPUT' &&
+        (element.type == 'radio' || element.type == 'checkbox')) {
+      position = "bottomcenter topleft";
+    } else {
+      let win = element.ownerDocument.defaultView;
+      let style = win.getComputedStyle(element, null);
+      let utils = win.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
+                     .getInterface(Components.interfaces.nsIDOMWindowUtils);
+
+      if (style.direction == 'rtl') {
+        offset = parseInt(style.paddingRight) + parseInt(style.borderRightWidth);
+      } else {
+        offset = parseInt(style.paddingLeft) + parseInt(style.borderLeftWidth);
+      }
+
+      offset = Math.round(offset * utils.fullZoom);
+
+      position = "after_start";
+    }
+
+    this.panel.openPopup(element, position, offset, 0);
+  }
+};
+
+var gBrowserInit = {
+  delayedStartupFinished: false,
+
+  onLoad: function() {
+    gMultiProcessBrowser =
+      window.QueryInterface(Ci.nsIInterfaceRequestor)
+      .getInterface(Ci.nsIWebNavigation)
+      .QueryInterface(Ci.nsILoadContext)
+      .useRemoteTabs;
+
+    var mustLoadSidebar = false;
+
+    if (!gMultiProcessBrowser) {
+      // There is a Content:Click message manually sent from content.
+      Cc["@mozilla.org/eventlistenerservice;1"]
+        .getService(Ci.nsIEventListenerService)
+        .addSystemEventListener(gBrowser, "click", contentAreaClick, true);
+    }
+
+    gBrowser.addEventListener("DOMUpdatePageReport", gPopupBlockerObserver, false);
+
+    // Note that the XBL binding is untrusted
+    gBrowser.addEventListener("PluginBindingAttached", gPluginHandler, true, true);
+    gBrowser.addEventListener("PluginCrashed",         gPluginHandler, true);
+    gBrowser.addEventListener("PluginOutdated",        gPluginHandler, true);
+    gBrowser.addEventListener("PluginInstantiated",    gPluginHandler, true);
+    gBrowser.addEventListener("PluginRemoved",         gPluginHandler, true);
+
+    gBrowser.addEventListener("NewPluginInstalled", gPluginHandler.newPluginInstalled, true);
+
+    Services.obs.addObserver(gPluginHandler.pluginCrashed, "plugin-crashed", false);
+
+    window.addEventListener("AppCommand", HandleAppCommandEvent, true);
+
+    // These routines add message listeners. They must run before
+    // loading the frame script to ensure that we don't miss any
+    // message sent between when the frame script is loaded and when
+    // the listener is registered.
+    DOMLinkHandler.init();
+    gPageStyleMenu.init();
+    LanguageDetectionListener.init();
+
+    messageManager.loadFrameScript("chrome://browser/content/content.js", true);
+
+    // initialize observers and listeners
+    // and give C++ access to gBrowser
+    XULBrowserWindow.init();
+    window.QueryInterface(Ci.nsIInterfaceRequestor)
+          .getInterface(nsIWebNavigation)
+          .QueryInterface(Ci.nsIDocShellTreeItem).treeOwner
+          .QueryInterface(Ci.nsIInterfaceRequestor)
+          .getInterface(Ci.nsIXULWindow)
+          .XULBrowserWindow = window.XULBrowserWindow;
+    window.QueryInterface(Ci.nsIDOMChromeWindow).browserDOMWindow =
+      new nsBrowserAccess();
+
+    // hook up UI through progress listener
+    gBrowser.addProgressListener(window.XULBrowserWindow);
+    gBrowser.addTabsProgressListener(window.TabsProgressListener);
+
+    // setup simple gestures support
+    gGestureSupport.init(true);
+
+    // setup history swipe animation
+    gHistorySwipeAnimation.init();
+
+    if (window.opener && !window.opener.closed &&
+        PrivateBrowsingUtils.isWindowPrivate(window) == PrivateBrowsingUtils.isWindowPrivate(window.opener)) {
+      let openerSidebarBox = window.opener.document.getElementById("sidebar-box");
+      // If the opener had a sidebar, open the same sidebar in our window.
+      // The opener can be the hidden window too, if we're coming from the state
+      // where no windows are open, and the hidden window has no sidebar box.
+      if (openerSidebarBox && !openerSidebarBox.hidden) {
+        let sidebarCmd = openerSidebarBox.getAttribute("sidebarcommand");
+        let sidebarCmdElem = document.getElementById(sidebarCmd);
+
+        // dynamically generated sidebars will fail this check.
+        if (sidebarCmdElem) {
+          let sidebarBox = document.getElementById("sidebar-box");
+          let sidebarTitle = document.getElementById("sidebar-title");
+
+          sidebarTitle.setAttribute(
+            "value", window.opener.document.getElementById("sidebar-title").getAttribute("value"));
+          sidebarBox.setAttribute("width", openerSidebarBox.boxObject.width);
+
+          sidebarBox.setAttribute("sidebarcommand", sidebarCmd);
+          // Note: we're setting 'src' on sidebarBox, which is a <vbox>, not on
+          // the <browser id="sidebar">. This lets us delay the actual load until
+          // delayedStartup().
+          sidebarBox.setAttribute(
+            "src", window.opener.document.getElementById("sidebar").getAttribute("src"));
+          mustLoadSidebar = true;
+
+          sidebarBox.hidden = false;
+          document.getElementById("sidebar-splitter").hidden = false;
+          sidebarCmdElem.setAttribute("checked", "true");
+        }
+      }
+    }
+    else {
+      let box = document.getElementById("sidebar-box");
+      if (box.hasAttribute("sidebarcommand")) {
+        let commandID = box.getAttribute("sidebarcommand");
+        if (commandID) {
+          let command = document.getElementById(commandID);
+          if (command) {
+            mustLoadSidebar = true;
+            box.hidden = false;
+            document.getElementById("sidebar-splitter").hidden = false;
+            command.setAttribute("checked", "true");
+          }
+          else {
+            // Remove the |sidebarcommand| attribute, because the element it
+            // refers to no longer exists, so we should assume this sidebar
+            // panel has been uninstalled. (249883)
+            box.removeAttribute("sidebarcommand");
+          }
+        }
+      }
+    }
+
+    // Certain kinds of automigration rely on this notification to complete their
+    // tasks BEFORE the browser window is shown.
+    Services.obs.notifyObservers(null, "browser-window-before-show", "");
+
+    // Set a sane starting width/height for all resolutions on new profiles.
+    if (!document.documentElement.hasAttribute("width")) {
+      let defaultWidth;
+      let defaultHeight;
+
+      // Very small: maximize the window
+      // Portrait  : use about full width and 3/4 height, to view entire pages
+      //             at once (without being obnoxiously tall)
+      // Widescreen: use about half width, to suggest side-by-side page view
+      // Otherwise : use 3/4 height and width
+      if (screen.availHeight <= 600) {
+        document.documentElement.setAttribute("sizemode", "maximized");
+        defaultWidth = 610;
+        defaultHeight = 450;
+      }
+      else {
+        if (screen.availWidth <= screen.availHeight) {
+          defaultWidth = screen.availWidth * .9;
+          defaultHeight = screen.availHeight * .75;
+        }
+        else if (screen.availWidth >= 2048) {
+          defaultWidth = (screen.availWidth / 2) - 20;
+          defaultHeight = screen.availHeight - 10;
+        }
+        else {
+          defaultWidth = screen.availWidth * .75;
+          defaultHeight = screen.availHeight * .75;
+        }
+
+#if MOZ_WIDGET_GTK == 2
+        // On X, we're not currently able to account for the size of the window
+        // border.  Use 28px as a guess (titlebar + bottom window border)
+        defaultHeight -= 28;
+#endif
+      }
+      document.documentElement.setAttribute("width", defaultWidth);
+      document.documentElement.setAttribute("height", defaultHeight);
+    }
+
+    if (!window.toolbar.visible) {
+      // adjust browser UI for popups
+      if (gURLBar) {
+        gURLBar.setAttribute("readonly", "true");
+        gURLBar.setAttribute("enablehistory", "false");
+      }
+      goSetCommandEnabled("cmd_newNavigatorTab", false);
+    }
+
+    // Misc. inits.
+    CombinedStopReload.init();
+    gPrivateBrowsingUI.init();
+    TabsInTitlebar.init();
+
+#ifdef XP_WIN
+    if (window.matchMedia("(-moz-os-version: windows-win8)").matches &&
+        window.matchMedia("(-moz-windows-default-theme)").matches) {
+      let windowFrameColor = Cu.import("resource:///modules/Windows8WindowFrameColor.jsm", {})
+                               .Windows8WindowFrameColor.get();
+
+      // Formula from W3C's WCAG 2.0 spec's color ratio and relative luminance,
+      // section 1.3.4, http://www.w3.org/TR/WCAG20/ .
+      windowFrameColor = windowFrameColor.map((color) => {
+        if (color <= 10) {
+          return color / 255 / 12.92;
+        }
+        return Math.pow(((color / 255) + 0.055) / 1.055, 2.4);
+      });
+      let backgroundLuminance = windowFrameColor[0] * 0.2126 +
+                                windowFrameColor[1] * 0.7152 +
+                                windowFrameColor[2] * 0.0722;
+      let foregroundLuminance = 0; // Default to black for foreground text.
+      let contrastRatio = (backgroundLuminance + 0.05) / (foregroundLuminance + 0.05);
+      if (contrastRatio < 3) {
+        document.documentElement.setAttribute("darkwindowframe", "true");
+      }
+    }
+#endif
+
+    ToolbarIconColor.init();
+
+    // Wait until chrome is painted before executing code not critical to making the window visible
+    this._boundDelayedStartup = this._delayedStartup.bind(this, mustLoadSidebar);
+    window.addEventListener("MozAfterPaint", this._boundDelayedStartup);
+
+    this._loadHandled = true;
+  },
+
+  _cancelDelayedStartup: function () {
+    window.removeEventListener("MozAfterPaint", this._boundDelayedStartup);
+    this._boundDelayedStartup = null;
+  },
+
+  _delayedStartup: function(mustLoadSidebar) {
+    let tmp = {};
+    Cu.import("resource://gre/modules/TelemetryTimestamps.jsm", tmp);
+    let TelemetryTimestamps = tmp.TelemetryTimestamps;
+    TelemetryTimestamps.add("delayedStartupStarted");
+
+    this._cancelDelayedStartup();
+
+    // We need to set the MozApplicationManifest event listeners up
+    // before we start loading the home pages in case a document has
+    // a "manifest" attribute, in which the MozApplicationManifest event
+    // will be fired.
+    gBrowser.addEventListener("MozApplicationManifest",
+                              OfflineApps, false);
+    // listen for offline apps on social
+    let socialBrowser = document.getElementById("social-sidebar-browser");
+    socialBrowser.addEventListener("MozApplicationManifest",
+                              OfflineApps, false);
+
+    let uriToLoad = this._getUriToLoad();
+    var isLoadingBlank = isBlankPageURL(uriToLoad);
+
+    // This pageshow listener needs to be registered before we may call
+    // swapBrowsersAndCloseOther() to receive pageshow events fired by that.
+    gBrowser.addEventListener("pageshow", function(event) {
+      // Filter out events that are not about the document load we are interested in
+      if (content && event.target == content.document)
+        setTimeout(pageShowEventHandlers, 0, event.persisted);
+    }, true);
+
+    if (uriToLoad && uriToLoad != "about:blank") {
+      if (uriToLoad instanceof Ci.nsISupportsArray) {
+        let count = uriToLoad.Count();
+        let specs = [];
+        for (let i = 0; i < count; i++) {
+          let urisstring = uriToLoad.GetElementAt(i).QueryInterface(Ci.nsISupportsString);
+          specs.push(urisstring.data);
+        }
+
+        // This function throws for certain malformed URIs, so use exception handling
+        // so that we don't disrupt startup
+        try {
+          gBrowser.loadTabs(specs, false, true);
+        } catch (e) {}
+      }
+      else if (uriToLoad instanceof XULElement) {
+        // swap the given tab with the default about:blank tab and then close
+        // the original tab in the other window.
+
+        // Stop the about:blank load
+        gBrowser.stop();
+        // make sure it has a docshell
+        gBrowser.docShell;
+
+        gBrowser.swapBrowsersAndCloseOther(gBrowser.selectedTab, uriToLoad);
+      }
+      // window.arguments[2]: referrer (nsIURI)
+      //                 [3]: postData (nsIInputStream)
+      //                 [4]: allowThirdPartyFixup (bool)
+      else if (window.arguments.length >= 3) {
+        loadURI(uriToLoad, window.arguments[2], window.arguments[3] || null,
+                window.arguments[4] || false);
+        window.focus();
+      }
+      // Note: loadOneOrMoreURIs *must not* be called if window.arguments.length >= 3.
+      // Such callers expect that window.arguments[0] is handled as a single URI.
+      else {
+        if (uriToLoad == "about:newtab" &&
+            Services.prefs.getBoolPref("browser.newtabpage.enabled")) {
+          Services.telemetry.getHistogramById("NEWTAB_PAGE_SHOWN").add(true);
+        }
+        loadOneOrMoreURIs(uriToLoad);
+      }
+    }
+
+#ifdef MOZ_SAFE_BROWSING
+    // Bug 778855 - Perf regression if we do this here. To be addressed in bug 779008.
+    setTimeout(function() { SafeBrowsing.init(); }, 2000);
+#endif
+
+    Services.obs.addObserver(gSessionHistoryObserver, "browser:purge-session-history", false);
+    Services.obs.addObserver(gXPInstallObserver, "addon-install-disabled", false);
+    Services.obs.addObserver(gXPInstallObserver, "addon-install-started", false);
+    Services.obs.addObserver(gXPInstallObserver, "addon-install-blocked", false);
+    Services.obs.addObserver(gXPInstallObserver, "addon-install-failed", false);
+    Services.obs.addObserver(gXPInstallObserver, "addon-install-complete", false);
+    Services.obs.addObserver(gFormSubmitObserver, "invalidformsubmit", false);
+
+    BrowserOffline.init();
+    OfflineApps.init();
+    IndexedDBPromptHelper.init();
+    CanvasPermissionPromptHelper.init();
+    gFormSubmitObserver.init();
+    gRemoteTabsUI.init();
+
+    // Initialize the full zoom setting.
+    // We do this before the session restore service gets initialized so we can
+    // apply full zoom settings to tabs restored by the session restore service.
+    FullZoom.init();
+    PanelUI.init();
+    LightweightThemeListener.init();
+    WebrtcIndicator.init();
+
+    // Ensure login manager is up and running.
+    Services.logins;
+
+#ifdef MOZ_CRASHREPORTER
+    if (gMultiProcessBrowser)
+      TabCrashReporter.init();
+#endif
+
+    if (mustLoadSidebar) {
+      let sidebar = document.getElementById("sidebar");
+      let sidebarBox = document.getElementById("sidebar-box");
+      sidebar.setAttribute("src", sidebarBox.getAttribute("src"));
+    }
+
+    UpdateUrlbarSearchSplitterState();
+
+    if (!isLoadingBlank || !focusAndSelectUrlBar())
+      gBrowser.selectedBrowser.focus();
+
+    // Set up Sanitize Item
+    this._initializeSanitizer();
+
+    // Enable/Disable auto-hide tabbar
+    gBrowser.tabContainer.updateVisibility();
+
+    BookmarkingUI.init();
+
+    gPrefService.addObserver(gHomeButton.prefDomain, gHomeButton, false);
+
+    var homeButton = document.getElementById("home-button");
+    gHomeButton.updateTooltip(homeButton);
+    gHomeButton.updatePersonalToolbarStyle(homeButton);
+
+    // BiDi UI
+    gBidiUI = isBidiEnabled();
+    if (gBidiUI) {
+      document.getElementById("documentDirection-separator").hidden = false;
+      document.getElementById("documentDirection-swap").hidden = false;
+      document.getElementById("textfieldDirection-separator").hidden = false;
+      document.getElementById("textfieldDirection-swap").hidden = false;
+    }
+
+    // Setup click-and-hold gestures access to the session history
+    // menus if global click-and-hold isn't turned on
+    if (!getBoolPref("ui.click_hold_context_menus", false))
+      SetClickAndHoldHandlers();
+
+    let NP = {};
+    Cu.import("resource:///modules/NetworkPrioritizer.jsm", NP);
+    NP.trackBrowserWindow(window);
+
+    PlacesToolbarHelper.init();
+
+    ctrlTab.readPref();
+    gPrefService.addObserver(ctrlTab.prefName, ctrlTab, false);
+
+    // Initialize the download manager some time after the app starts so that
+    // auto-resume downloads begin (such as after crashing or quitting with
+    // active downloads) and speeds up the first-load of the download manager UI.
+    // If the user manually opens the download manager before the timeout, the
+    // downloads will start right away, and initializing again won't hurt.
+    setTimeout(function() {
+      try {
+        Cu.import("resource:///modules/DownloadsCommon.jsm", {})
+          .DownloadsCommon.initializeAllDataLinks();
+        Cu.import("resource:///modules/DownloadsTaskbar.jsm", {})
+          .DownloadsTaskbar.registerIndicator(window);
+      } catch (ex) {
+        Cu.reportError(ex);
+      }
+    }, 10000);
+
+    // The object handling the downloads indicator is also initialized here in the
+    // delayed startup function, but the actual indicator element is not loaded
+    // unless there are downloads to be displayed.
+    DownloadsButton.initializeIndicator();
+
+#ifndef XP_MACOSX
+    updateEditUIVisibility();
+    let placesContext = document.getElementById("placesContext");
+    placesContext.addEventListener("popupshowing", updateEditUIVisibility, false);
+    placesContext.addEventListener("popuphiding", updateEditUIVisibility, false);
+#endif
+
+    gBrowser.mPanelContainer.addEventListener("InstallBrowserTheme", LightWeightThemeWebInstaller, false, true);
+    gBrowser.mPanelContainer.addEventListener("PreviewBrowserTheme", LightWeightThemeWebInstaller, false, true);
+    gBrowser.mPanelContainer.addEventListener("ResetBrowserThemePreview", LightWeightThemeWebInstaller, false, true);
+
+    if (Win7Features)
+      Win7Features.onOpenWindow();
+
+   // called when we go into full screen, even if initiated by a web page script
+    window.addEventListener("fullscreen", onFullScreen, true);
+
+    // Called when we enter DOM full-screen mode. Note we can already be in browser
+    // full-screen mode when we enter DOM full-screen mode.
+    window.addEventListener("MozEnteredDomFullscreen", onMozEnteredDomFullscreen, true);
+
+    if (window.fullScreen)
+      onFullScreen();
+    if (document.mozFullScreen)
+      onMozEnteredDomFullscreen();
+
+#ifdef MOZ_SERVICES_SYNC
+    // initialize the sync UI
+    gSyncUI.init();
+    gFxAccounts.init();
+#endif
+
+#ifdef MOZ_DATA_REPORTING
+    gDataNotificationInfoBar.init();
+#endif
+
+    gBrowserThumbnails.init();
+
+    // Add Devtools menuitems and listeners
+    gDevToolsBrowser.registerBrowserWindow(window);
+
+    window.addEventListener("mousemove", MousePosTracker, false);
+    window.addEventListener("dragover", MousePosTracker, false);
+
+    gNavToolbox.addEventListener("customizationstarting", CustomizationHandler);
+    gNavToolbox.addEventListener("customizationchange", CustomizationHandler);
+    gNavToolbox.addEventListener("customizationending", CustomizationHandler);
+
+    // End startup crash tracking after a delay to catch crashes while restoring
+    // tabs and to postpone saving the pref to disk.
+    try {
+      const startupCrashEndDelay = 30 * 1000;
+      setTimeout(Services.startup.trackStartupCrashEnd, startupCrashEndDelay);
+    } catch (ex) {
+      Cu.reportError("Could not end startup crash tracking: " + ex);
+    }
+
+    if (typeof WindowsPrefSync !== 'undefined') {
+      // Pulls in Metro controlled prefs and pushes out Desktop controlled prefs
+      WindowsPrefSync.init();
+    }
+
+    SessionStore.promiseInitialized.then(() => {
+      // Bail out if the window has been closed in the meantime.
+      if (window.closed) {
+        return;
+      }
+
+      // Enable the Restore Last Session command if needed
+      RestoreLastSessionObserver.init();
+
+      SocialUI.init();
+      TabView.init();
+
+      setTimeout(function () { BrowserChromeTest.markAsReady(); }, 0);
+    });
+    this.delayedStartupFinished = true;
+
+    Services.obs.notifyObservers(window, "browser-delayed-startup-finished", "");
+    TelemetryTimestamps.add("delayedStartupFinished");
+  },
+
+  // Returns the URI(s) to load at startup.
+  _getUriToLoad: function () {
+    // window.arguments[0]: URI to load (string), or an nsISupportsArray of
+    //                      nsISupportsStrings to load, or a xul:tab of
+    //                      a tabbrowser, which will be replaced by this
+    //                      window (for this case, all other arguments are
+    //                      ignored).
+    if (!window.arguments || !window.arguments[0])
+      return null;
+
+    let uri = window.arguments[0];
+    let sessionStartup = Cc["@mozilla.org/browser/sessionstartup;1"]
+                           .getService(Ci.nsISessionStartup);
+    let defaultArgs = Cc["@mozilla.org/browser/clh;1"]
+                        .getService(Ci.nsIBrowserHandler)
+                        .defaultArgs;
+
+    // If the given URI matches defaultArgs (the default homepage) we want
+    // to block its load if we're going to restore a session anyway.
+    if (uri == defaultArgs && sessionStartup.willOverrideHomepage)
+      return null;
+
+    return uri;
+  },
+
+  onUnload: function() {
+    // In certain scenarios it's possible for unload to be fired before onload,
+    // (e.g. if the window is being closed after browser.js loads but before the
+    // load completes). In that case, there's nothing to do here.
+    if (!this._loadHandled)
+      return;
+
+    gDevToolsBrowser.forgetBrowserWindow(window);
+
+    let desc = Object.getOwnPropertyDescriptor(window, "DeveloperToolbar");
+    if (desc && !desc.get) {
+      DeveloperToolbar.destroy();
+    }
+
+    // First clean up services initialized in gBrowserInit.onLoad (or those whose
+    // uninit methods don't depend on the services having been initialized).
+
+    CombinedStopReload.uninit();
+
+    gGestureSupport.init(false);
+
+    gHistorySwipeAnimation.uninit();
+
+    FullScreen.cleanup();
+
+#ifdef MOZ_SERVICES_SYNC
+    gFxAccounts.uninit();
+#endif
+
+    Services.obs.removeObserver(gPluginHandler.pluginCrashed, "plugin-crashed");
+
+    try {
+      gBrowser.removeProgressListener(window.XULBrowserWindow);
+      gBrowser.removeTabsProgressListener(window.TabsProgressListener);
+    } catch (ex) {
+    }
+
+    PlacesToolbarHelper.uninit();
+
+    BookmarkingUI.uninit();
+
+    TabsInTitlebar.uninit();
+
+    ToolbarIconColor.uninit();
+
+    var enumerator = Services.wm.getEnumerator(null);
+    enumerator.getNext();
+    if (!enumerator.hasMoreElements()) {
+      document.persist("sidebar-box", "sidebarcommand");
+      document.persist("sidebar-box", "width");
+      document.persist("sidebar-box", "src");
+      document.persist("sidebar-title", "value");
+    }
+
+    // Now either cancel delayedStartup, or clean up the services initialized from
+    // it.
+    if (this._boundDelayedStartup) {
+      this._cancelDelayedStartup();
+    } else {
+      if (Win7Features)
+        Win7Features.onCloseWindow();
+
+      gPrefService.removeObserver(ctrlTab.prefName, ctrlTab);
+      ctrlTab.uninit();
+      TabView.uninit();
+      SocialUI.uninit();
+      gBrowserThumbnails.uninit();
+      FullZoom.destroy();
+
+      Services.obs.removeObserver(gSessionHistoryObserver, "browser:purge-session-history");
+      Services.obs.removeObserver(gXPInstallObserver, "addon-install-disabled");
+      Services.obs.removeObserver(gXPInstallObserver, "addon-install-started");
+      Services.obs.removeObserver(gXPInstallObserver, "addon-install-blocked");
+      Services.obs.removeObserver(gXPInstallObserver, "addon-install-failed");
+      Services.obs.removeObserver(gXPInstallObserver, "addon-install-complete");
+      Services.obs.removeObserver(gFormSubmitObserver, "invalidformsubmit");
+
+      try {
+        gPrefService.removeObserver(gHomeButton.prefDomain, gHomeButton);
+      } catch (ex) {
+        Cu.reportError(ex);
+      }
+
+      if (typeof WindowsPrefSync !== 'undefined') {
+        WindowsPrefSync.uninit();
+      }
+
+      BrowserOffline.uninit();
+      OfflineApps.uninit();
+      IndexedDBPromptHelper.uninit();
+      CanvasPermissionPromptHelper.uninit();
+      LightweightThemeListener.uninit();
+      PanelUI.uninit();
+    }
+
+    // Final window teardown, do this last.
+    window.XULBrowserWindow = null;
+    window.QueryInterface(Ci.nsIInterfaceRequestor)
+          .getInterface(Ci.nsIWebNavigation)
+          .QueryInterface(Ci.nsIDocShellTreeItem).treeOwner
+          .QueryInterface(Ci.nsIInterfaceRequestor)
+          .getInterface(Ci.nsIXULWindow)
+          .XULBrowserWindow = null;
+    window.QueryInterface(Ci.nsIDOMChromeWindow).browserDOMWindow = null;
+  },
+
+#ifdef XP_MACOSX
+  // nonBrowserWindowStartup(), nonBrowserWindowDelayedStartup(), and
+  // nonBrowserWindowShutdown() are used for non-browser windows in
+  // macBrowserOverlay
+  nonBrowserWindowStartup: function() {
+    // Disable inappropriate commands / submenus
+    var disabledItems = ['Browser:SavePage',
+                         'Browser:SendLink', 'cmd_pageSetup', 'cmd_print', 'cmd_find', 'cmd_findAgain',
+                         'viewToolbarsMenu', 'viewSidebarMenuMenu', 'Browser:Reload',
+                         'viewFullZoomMenu', 'pageStyleMenu', 'charsetMenu', 'View:PageSource', 'View:FullScreen',
+                         'viewHistorySidebar', 'Browser:AddBookmarkAs', 'Browser:BookmarkAllTabs',
+                         'View:PageInfo', 'Browser:ToggleTabView'];
+    var element;
+
+    for (let disabledItem of disabledItems) {
+      element = document.getElementById(disabledItem);
+      if (element)
+        element.setAttribute("disabled", "true");
+    }
+
+    // If no windows are active (i.e. we're the hidden window), disable the close, minimize
+    // and zoom menu commands as well
+    if (window.location.href == "chrome://browser/content/hiddenWindow.xul") {
+      var hiddenWindowDisabledItems = ['cmd_close', 'minimizeWindow', 'zoomWindow'];
+      for (let hiddenWindowDisabledItem of hiddenWindowDisabledItems) {
+        element = document.getElementById(hiddenWindowDisabledItem);
+        if (element)
+          element.setAttribute("disabled", "true");
+      }
+
+      // also hide the window-list separator
+      element = document.getElementById("sep-window-list");
+      element.setAttribute("hidden", "true");
+
+      // Setup the dock menu.
+      let dockMenuElement = document.getElementById("menu_mac_dockmenu");
+      if (dockMenuElement != null) {
+        let nativeMenu = Cc["@mozilla.org/widget/standalonenativemenu;1"]
+                         .createInstance(Ci.nsIStandaloneNativeMenu);
+
+        try {
+          nativeMenu.init(dockMenuElement);
+
+          let dockSupport = Cc["@mozilla.org/widget/macdocksupport;1"]
+                            .getService(Ci.nsIMacDockSupport);
+          dockSupport.dockMenu = nativeMenu;
+        }
+        catch (e) {
+        }
+      }
+    }
+
+    if (PrivateBrowsingUtils.permanentPrivateBrowsing) {
+      document.getElementById("macDockMenuNewWindow").hidden = true;
+    }
+
+    this._delayedStartupTimeoutId = setTimeout(this.nonBrowserWindowDelayedStartup.bind(this), 0);
+  },
+
+  nonBrowserWindowDelayedStartup: function() {
+    this._delayedStartupTimeoutId = null;
+
+    // initialise the offline listener
+    BrowserOffline.init();
+
+    // Set up Sanitize Item
+    this._initializeSanitizer();
+
+    // initialize the private browsing UI
+    gPrivateBrowsingUI.init();
+
+#ifdef MOZ_SERVICES_SYNC
+    // initialize the sync UI
+    gSyncUI.init();
+#endif
+  },
+
+  nonBrowserWindowShutdown: function() {
+    // If nonBrowserWindowDelayedStartup hasn't run yet, we have no work to do -
+    // just cancel the pending timeout and return;
+    if (this._delayedStartupTimeoutId) {
+      clearTimeout(this._delayedStartupTimeoutId);
+      return;
+    }
+
+    BrowserOffline.uninit();
+  },
+#endif
+
+  _initializeSanitizer: function() {
+    const kDidSanitizeDomain = "privacy.sanitize.didShutdownSanitize";
+    if (gPrefService.prefHasUserValue(kDidSanitizeDomain)) {
+      gPrefService.clearUserPref(kDidSanitizeDomain);
+      // We need to persist this preference change, since we want to
+      // check it at next app start even if the browser exits abruptly
+      gPrefService.savePrefFile(null);
+    }
+
+    /**
+     * Migrate Firefox 3.0 privacy.item prefs under one of these conditions:
+     *
+     * a) User has customized any privacy.item prefs
+     * b) privacy.sanitize.sanitizeOnShutdown is set
+     */
+    if (!gPrefService.getBoolPref("privacy.sanitize.migrateFx3Prefs")) {
+      let itemBranch = gPrefService.getBranch("privacy.item.");
+      let itemArray = itemBranch.getChildList("");
+
+      // See if any privacy.item prefs are set
+      let doMigrate = itemArray.some(function (name) itemBranch.prefHasUserValue(name));
+      // Or if sanitizeOnShutdown is set
+      if (!doMigrate)
+        doMigrate = gPrefService.getBoolPref("privacy.sanitize.sanitizeOnShutdown");
+
+      if (doMigrate) {
+        let cpdBranch = gPrefService.getBranch("privacy.cpd.");
+        let clearOnShutdownBranch = gPrefService.getBranch("privacy.clearOnShutdown.");
+        for (let name of itemArray) {
+          try {
+            // don't migrate password or offlineApps clearing in the CRH dialog since
+            // there's no UI for those anymore. They default to false. bug 497656
+            if (name != "passwords" && name != "offlineApps")
+              cpdBranch.setBoolPref(name, itemBranch.getBoolPref(name));
+            clearOnShutdownBranch.setBoolPref(name, itemBranch.getBoolPref(name));
+          }
+          catch(e) {
+            Cu.reportError("Exception thrown during privacy pref migration: " + e);
+          }
+        }
+      }
+
+      gPrefService.setBoolPref("privacy.sanitize.migrateFx3Prefs", true);
+    }
+  },
+}
+
+
+/* Legacy global init functions */
+var BrowserStartup        = gBrowserInit.onLoad.bind(gBrowserInit);
+var BrowserShutdown       = gBrowserInit.onUnload.bind(gBrowserInit);
+#ifdef XP_MACOSX
+var nonBrowserWindowStartup        = gBrowserInit.nonBrowserWindowStartup.bind(gBrowserInit);
+var nonBrowserWindowDelayedStartup = gBrowserInit.nonBrowserWindowDelayedStartup.bind(gBrowserInit);
+var nonBrowserWindowShutdown       = gBrowserInit.nonBrowserWindowShutdown.bind(gBrowserInit);
+#endif
+
+function HandleAppCommandEvent(evt) {
+  switch (evt.command) {
+  case "Back":
+    BrowserBack();
+    break;
+  case "Forward":
+    BrowserForward();
+    break;
+  case "Reload":
+    BrowserReloadSkipCache();
+    break;
+  case "Stop":
+    if (XULBrowserWindow.stopCommand.getAttribute("disabled") != "true")
+      BrowserStop();
+    break;
+  case "Search":
+    BrowserSearch.webSearch();
+    break;
+  case "Bookmarks":
+    toggleSidebar('viewBookmarksSidebar');
+    break;
+  case "Home":
+    BrowserHome();
+    break;
+  case "New":
+    BrowserOpenTab();
+    break;
+  case "Close":
+    BrowserCloseTabOrWindow();
+    break;
+  case "Find":
+    gFindBar.onFindCommand();
+    break;
+  case "Help":
+    openHelpLink('firefox-help');
+    break;
+  case "Open":
+    BrowserOpenFileWindow();
+    break;
+  case "Print":
+    PrintUtils.print();
+    break;
+  case "Save":
+    saveDocument(window.content.document);
+    break;
+  case "SendMail":
+    MailIntegration.sendLinkForWindow(window.content);
+    break;
+  default:
+    return;
+  }
+  evt.stopPropagation();
+  evt.preventDefault();
+}
+
+function gotoHistoryIndex(aEvent) {
+  let index = aEvent.target.getAttribute("index");
+  if (!index)
+    return false;
+
+  let where = whereToOpenLink(aEvent);
+
+  if (where == "current") {
+    // Normal click. Go there in the current tab and update session history.
+
+    try {
+      gBrowser.gotoIndex(index);
+    }
+    catch(ex) {
+      return false;
+    }
+    return true;
+  }
+  // Modified click. Go there in a new tab/window.
+
+  duplicateTabIn(gBrowser.selectedTab, where, index - gBrowser.sessionHistory.index);
+  return true;
+}
+
+function BrowserForward(aEvent) {
+  let where = whereToOpenLink(aEvent, false, true);
+
+  if (where == "current") {
+    try {
+      gBrowser.goForward();
+    }
+    catch(ex) {
+    }
+  }
+  else {
+    duplicateTabIn(gBrowser.selectedTab, where, 1);
+  }
+}
+
+function BrowserBack(aEvent) {
+  let where = whereToOpenLink(aEvent, false, true);
+
+  if (where == "current") {
+    try {
+      gBrowser.goBack();
+    }
+    catch(ex) {
+    }
+  }
+  else {
+    duplicateTabIn(gBrowser.selectedTab, where, -1);
+  }
+}
+
+function BrowserHandleBackspace()
+{
+  switch (gPrefService.getIntPref("browser.backspace_action")) {
+  case 0:
+    BrowserBack();
+    break;
+  case 1:
+    goDoCommand("cmd_scrollPageUp");
+    break;
+  }
+}
+
+function BrowserHandleShiftBackspace()
+{
+  switch (gPrefService.getIntPref("browser.backspace_action")) {
+  case 0:
+    BrowserForward();
+    break;
+  case 1:
+    goDoCommand("cmd_scrollPageDown");
+    break;
+  }
+}
+
+function BrowserStop() {
+  const stopFlags = nsIWebNavigation.STOP_ALL;
+  gBrowser.webNavigation.stop(stopFlags);
+}
+
+function BrowserReloadOrDuplicate(aEvent) {
+  var backgroundTabModifier = aEvent.button == 1 ||
+#ifdef XP_MACOSX
+    aEvent.metaKey;
+#else
+    aEvent.ctrlKey;
+#endif
+  if (aEvent.shiftKey && !backgroundTabModifier) {
+    BrowserReloadSkipCache();
+    return;
+  }
+
+  let where = whereToOpenLink(aEvent, false, true);
+  if (where == "current")
+    BrowserReload();
+  else
+    duplicateTabIn(gBrowser.selectedTab, where);
+}
+
+function BrowserReload() {
+  const reloadFlags = nsIWebNavigation.LOAD_FLAGS_NONE;
+  BrowserReloadWithFlags(reloadFlags);
+}
+
+function BrowserReloadSkipCache() {
+  // Bypass proxy and cache.
+  const reloadFlags = nsIWebNavigation.LOAD_FLAGS_BYPASS_PROXY | nsIWebNavigation.LOAD_FLAGS_BYPASS_CACHE;
+  BrowserReloadWithFlags(reloadFlags);
+}
+
+var BrowserHome = BrowserGoHome;
+function BrowserGoHome(aEvent) {
+  if (aEvent && "button" in aEvent &&
+      aEvent.button == 2) // right-click: do nothing
+    return;
+
+  var homePage = gHomeButton.getHomePage();
+  var where = whereToOpenLink(aEvent, false, true);
+  var urls;
+
+  // Home page should open in a new tab when current tab is an app tab
+  if (where == "current" &&
+      gBrowser &&
+      gBrowser.selectedTab.pinned)
+    where = "tab";
+
+  // openUILinkIn in utilityOverlay.js doesn't handle loading multiple pages
+  switch (where) {
+  case "current":
+    loadOneOrMoreURIs(homePage);
+    break;
+  case "tabshifted":
+  case "tab":
+    urls = homePage.split("|");
+    var loadInBackground = getBoolPref("browser.tabs.loadBookmarksInBackground", false);
+    gBrowser.loadTabs(urls, loadInBackground);
+    break;
+  case "window":
+    OpenBrowserWindow();
+    break;
+  }
+}
+
+function loadOneOrMoreURIs(aURIString)
+{
+#ifdef XP_MACOSX
+  // we're not a browser window, pass the URI string to a new browser window
+  if (window.location.href != getBrowserURL())
+  {
+    window.openDialog(getBrowserURL(), "_blank", "all,dialog=no", aURIString);
+    return;
+  }
+#endif
+  // This function throws for certain malformed URIs, so use exception handling
+  // so that we don't disrupt startup
+  try {
+    gBrowser.loadTabs(aURIString.split("|"), false, true);
+  }
+  catch (e) {
+  }
+}
+
+function focusAndSelectUrlBar() {
+  if (gURLBar) {
+    if (window.fullScreen)
+      FullScreen.mouseoverToggle(true);
+
+    gURLBar.select();
+    if (document.activeElement == gURLBar.inputField)
+      return true;
+  }
+  return false;
+}
+
+function openLocation() {
+  if (focusAndSelectUrlBar())
+    return;
+
+#ifdef XP_MACOSX
+  if (window.location.href != getBrowserURL()) {
+    var win = getTopWin();
+    if (win) {
+      // If there's an open browser window, it should handle this command
+      win.focus()
+      win.openLocation();
+    }
+    else {
+      // If there are no open browser windows, open a new one
+      window.openDialog("chrome://browser/content/", "_blank",
+                        "chrome,all,dialog=no", BROWSER_NEW_TAB_URL);
+    }
+  }
+#endif
+}
+
+function BrowserOpenTab()
+{
+  openUILinkIn(BROWSER_NEW_TAB_URL, "tab");
+}
+
+/* Called from the openLocation dialog. This allows that dialog to instruct
+   its opener to open a new window and then step completely out of the way.
+   Anything less byzantine is causing horrible crashes, rather believably,
+   though oddly only on Linux. */
+function delayedOpenWindow(chrome, flags, href, postData)
+{
+  // The other way to use setTimeout,
+  // setTimeout(openDialog, 10, chrome, "_blank", flags, url),
+  // doesn't work here.  The extra "magic" extra argument setTimeout adds to
+  // the callback function would confuse gBrowserInit.onLoad() by making
+  // window.arguments[1] be an integer instead of null.
+  setTimeout(function() { openDialog(chrome, "_blank", flags, href, null, null, postData); }, 10);
+}
+
+/* Required because the tab needs time to set up its content viewers and get the load of
+   the URI kicked off before becoming the active content area. */
+function delayedOpenTab(aUrl, aReferrer, aCharset, aPostData, aAllowThirdPartyFixup)
+{
+  gBrowser.loadOneTab(aUrl, {
+                      referrerURI: aReferrer,
+                      charset: aCharset,
+                      postData: aPostData,
+                      inBackground: false,
+                      allowThirdPartyFixup: aAllowThirdPartyFixup});
+}
+
+var gLastOpenDirectory = {
+  _lastDir: null,
+  get path() {
+    if (!this._lastDir || !this._lastDir.exists()) {
+      try {
+        this._lastDir = gPrefService.getComplexValue("browser.open.lastDir",
+                                                     Ci.nsILocalFile);
+        if (!this._lastDir.exists())
+          this._lastDir = null;
+      }
+      catch(e) {}
+    }
+    return this._lastDir;
+  },
+  set path(val) {
+    try {
+      if (!val || !val.isDirectory())
+        return;
+    } catch(e) {
+      return;
+    }
+    this._lastDir = val.clone();
+
+    // Don't save the last open directory pref inside the Private Browsing mode
+    if (!PrivateBrowsingUtils.isWindowPrivate(window))
+      gPrefService.setComplexValue("browser.open.lastDir", Ci.nsILocalFile,
+                                   this._lastDir);
+  },
+  reset: function() {
+    this._lastDir = null;
+  }
+};
+
+function BrowserOpenFileWindow()
+{
+  // Get filepicker component.
+  try {
+    const nsIFilePicker = Ci.nsIFilePicker;
+    let fp = Cc["@mozilla.org/filepicker;1"].createInstance(nsIFilePicker);
+    let fpCallback = function fpCallback_done(aResult) {
+      if (aResult == nsIFilePicker.returnOK) {
+        try {
+          if (fp.file) {
+            gLastOpenDirectory.path =
+              fp.file.parent.QueryInterface(Ci.nsILocalFile);
+          }
+        } catch (ex) {
+        }
+        openUILinkIn(fp.fileURL.spec, "current");
+      }
+    };
+
+    fp.init(window, gNavigatorBundle.getString("openFile"),
+            nsIFilePicker.modeOpen);
+    fp.appendFilters(nsIFilePicker.filterAll | nsIFilePicker.filterText |
+                     nsIFilePicker.filterImages | nsIFilePicker.filterXML |
+                     nsIFilePicker.filterHTML);
+    fp.displayDirectory = gLastOpenDirectory.path;
+    fp.open(fpCallback);
+  } catch (ex) {
+  }
+}
+
+function BrowserCloseTabOrWindow() {
+#ifdef XP_MACOSX
+  // If we're not a browser window, just close the window
+  if (window.location.href != getBrowserURL()) {
+    closeWindow(true);
+    return;
+  }
+#endif
+
+  // If the current tab is the last one, this will close the window.
+  gBrowser.removeCurrentTab({animate: true});
+}
+
+function BrowserTryToCloseWindow()
+{
+  if (WindowIsClosing())
+    window.close();     // WindowIsClosing does all the necessary checks
+}
+
+function loadURI(uri, referrer, postData, allowThirdPartyFixup) {
+  if (postData === undefined)
+    postData = null;
+
+  var flags = nsIWebNavigation.LOAD_FLAGS_NONE;
+  if (allowThirdPartyFixup) {
+    flags |= nsIWebNavigation.LOAD_FLAGS_ALLOW_THIRD_PARTY_FIXUP;
+    flags |= nsIWebNavigation.LOAD_FLAGS_FIXUP_SCHEME_TYPOS;
+  }
+
+  try {
+    gBrowser.loadURIWithFlags(uri, flags, referrer, null, postData);
+  } catch (e) {}
+}
+
+function getShortcutOrURIAndPostData(aURL, aCallback) {
+  let mayInheritPrincipal = false;
+  let postData = null;
+  let shortcutURL = null;
+  let keyword = aURL;
+  let param = "";
+
+  let offset = aURL.indexOf(" ");
+  if (offset > 0) {
+    keyword = aURL.substr(0, offset);
+    param = aURL.substr(offset + 1);
+  }
+
+  let engine = Services.search.getEngineByAlias(keyword);
+  if (engine) {
+    let submission = engine.getSubmission(param);
+    postData = submission.postData;
+    aCallback({ postData: submission.postData, url: submission.uri.spec,
+                mayInheritPrincipal: mayInheritPrincipal });
+    return;
+  }
+
+  [shortcutURL, postData] =
+    PlacesUtils.getURLAndPostDataForKeyword(keyword);
+
+  if (!shortcutURL) {
+    aCallback({ postData: postData, url: aURL,
+                mayInheritPrincipal: mayInheritPrincipal });
+    return;
+  }
+
+  let escapedPostData = "";
+  if (postData)
+    escapedPostData = unescape(postData);
+
+  if (/%s/i.test(shortcutURL) || /%s/i.test(escapedPostData)) {
+    let charset = "";
+    const re = /^(.*)\&mozcharset=([a-zA-Z][_\-a-zA-Z0-9]+)\s*$/;
+    let matches = shortcutURL.match(re);
+
+    let continueOperation = function () {
+      // encodeURIComponent produces UTF-8, and cannot be used for other charsets.
+      // escape() works in those cases, but it doesn't uri-encode +, @, and /.
+      // Therefore we need to manually replace these ASCII characters by their
+      // encodeURIComponent result, to match the behavior of nsEscape() with
+      // url_XPAlphas
+      let encodedParam = "";
+      if (charset && charset != "UTF-8")
+        encodedParam = escape(convertFromUnicode(charset, param)).
+                       replace(/[+@\/]+/g, encodeURIComponent);
+      else // Default charset is UTF-8
+        encodedParam = encodeURIComponent(param);
+
+      shortcutURL = shortcutURL.replace(/%s/g, encodedParam).replace(/%S/g, param);
+
+      if (/%s/i.test(escapedPostData)) // POST keyword
+        postData = getPostDataStream(escapedPostData, param, encodedParam,
+                                               "application/x-www-form-urlencoded");
+
+      // This URL came from a bookmark, so it's safe to let it inherit the current
+      // document's principal.
+      mayInheritPrincipal = true;
+
+      aCallback({ postData: postData, url: shortcutURL,
+                  mayInheritPrincipal: mayInheritPrincipal });
+    }
+
+    if (matches) {
+      [, shortcutURL, charset] = matches;
+      continueOperation();
+    } else {
+      // Try to get the saved character-set.
+      // makeURI throws if URI is invalid.
+      // Will return an empty string if character-set is not found.
+      try {
+        PlacesUtils.getCharsetForURI(makeURI(shortcutURL))
+                   .then(c => { charset = c; continueOperation(); });
+      } catch (ex) {
+        continueOperation();
+      }
+    }
+  }
+  else if (param) {
+    // This keyword doesn't take a parameter, but one was provided. Just return
+    // the original URL.
+    postData = null;
+
+    aCallback({ postData: postData, url: aURL,
+                mayInheritPrincipal: mayInheritPrincipal });
+  } else {
+    // This URL came from a bookmark, so it's safe to let it inherit the current
+    // document's principal.
+    mayInheritPrincipal = true;
+
+    aCallback({ postData: postData, url: shortcutURL,
+                mayInheritPrincipal: mayInheritPrincipal });
+  }
+}
+
+function getPostDataStream(aStringData, aKeyword, aEncKeyword, aType) {
+  var dataStream = Cc["@mozilla.org/io/string-input-stream;1"].
+                   createInstance(Ci.nsIStringInputStream);
+  aStringData = aStringData.replace(/%s/g, aEncKeyword).replace(/%S/g, aKeyword);
+  dataStream.data = aStringData;
+
+  var mimeStream = Cc["@mozilla.org/network/mime-input-stream;1"].
+                   createInstance(Ci.nsIMIMEInputStream);
+  mimeStream.addHeader("Content-Type", aType);
+  mimeStream.addContentLength = true;
+  mimeStream.setData(dataStream);
+  return mimeStream.QueryInterface(Ci.nsIInputStream);
+}
+
+function getLoadContext() {
+  return window.QueryInterface(Ci.nsIInterfaceRequestor)
+               .getInterface(Ci.nsIWebNavigation)
+               .QueryInterface(Ci.nsILoadContext);
+}
+
+function readFromClipboard()
+{
+  var url;
+
+  try {
+    // Create transferable that will transfer the text.
+    var trans = Components.classes["@mozilla.org/widget/transferable;1"]
+                          .createInstance(Components.interfaces.nsITransferable);
+    trans.init(getLoadContext());
+
+    trans.addDataFlavor("text/unicode");
+
+    // If available, use selection clipboard, otherwise global one
+    if (Services.clipboard.supportsSelectionClipboard())
+      Services.clipboard.getData(trans, Services.clipboard.kSelectionClipboard);
+    else
+      Services.clipboard.getData(trans, Services.clipboard.kGlobalClipboard);
+
+    var data = {};
+    var dataLen = {};
+    trans.getTransferData("text/unicode", data, dataLen);
+
+    if (data) {
+      data = data.value.QueryInterface(Components.interfaces.nsISupportsString);
+      url = data.data.substring(0, dataLen.value / 2);
+    }
+  } catch (ex) {
+  }
+
+  return url;
+}
+
+function BrowserViewSourceOfDocument(aDocument)
+{
+  var pageCookie;
+  var webNav;
+
+  // Get the document charset
+  var docCharset = "charset=" + aDocument.characterSet;
+
+  // Get the nsIWebNavigation associated with the document
+  try {
+      var win;
+      var ifRequestor;
+
+      // Get the DOMWindow for the requested document.  If the DOMWindow
+      // cannot be found, then just use the content window...
+      //
+      // XXX:  This is a bit of a hack...
+      win = aDocument.defaultView;
+      if (win == window) {
+        win = content;
+      }
+      ifRequestor = win.QueryInterface(Components.interfaces.nsIInterfaceRequestor);
+
+      webNav = ifRequestor.getInterface(nsIWebNavigation);
+  } catch(err) {
+      // If nsIWebNavigation cannot be found, just get the one for the whole
+      // window...
+      webNav = gBrowser.webNavigation;
+  }
+  //
+  // Get the 'PageDescriptor' for the current document. This allows the
+  // view-source to access the cached copy of the content rather than
+  // refetching it from the network...
+  //
+  try{
+    var PageLoader = webNav.QueryInterface(Components.interfaces.nsIWebPageDescriptor);
+
+    pageCookie = PageLoader.currentDescriptor;
+  } catch(err) {
+    // If no page descriptor is available, just use the view-source URL...
+  }
+
+  top.gViewSourceUtils.viewSource(webNav.currentURI.spec, pageCookie, aDocument);
+}
+
+// doc - document to use for source, or null for this window's document
+// initialTab - name of the initial tab to display, or null for the first tab
+// imageElement - image to load in the Media Tab of the Page Info window; can be null/omitted
+function BrowserPageInfo(doc, initialTab, imageElement) {
+  var args = {doc: doc, initialTab: initialTab, imageElement: imageElement};
+  var windows = Services.wm.getEnumerator("Browser:page-info");
+
+  var documentURL = doc ? doc.location : window.content.document.location;
+
+  // Check for windows matching the url
+  while (windows.hasMoreElements()) {
+    var currentWindow = windows.getNext();
+    if (currentWindow.closed) {
+      continue;
+    }
+    if (currentWindow.document.documentElement.getAttribute("relatedUrl") == documentURL) {
+      currentWindow.focus();
+      currentWindow.resetPageInfo(args);
+      return currentWindow;
+    }
+  }
+
+  // We didn't find a matching window, so open a new one.
+  return openDialog("chrome://browser/content/pageinfo/pageInfo.xul", "",
+                    "chrome,toolbar,dialog=no,resizable", args);
+}
+
+function URLBarSetURI(aURI) {
+  var value = gBrowser.userTypedValue;
+  var valid = false;
+
+  if (value == null) {
+    let uri = aURI || gBrowser.currentURI;
+    // Strip off "wyciwyg://" and passwords for the location bar
+    try {
+      uri = Services.uriFixup.createExposableURI(uri);
+    } catch (e) {}
+
+    // Replace initial page URIs with an empty string
+    // only if there's no opener (bug 370555).
+    // Bug 863515 - Make content.opener checks work in electrolysis.
+    if (gInitialPages.indexOf(uri.spec) != -1)
+      value = !gMultiProcessBrowser && content.opener ? uri.spec : "";
+    else
+      value = losslessDecodeURI(uri);
+
+    valid = !isBlankPageURL(uri.spec);
+  }
+
+  gURLBar.value = value;
+  gURLBar.valueIsTyped = !valid;
+  SetPageProxyState(valid ? "valid" : "invalid");
+}
+
+function losslessDecodeURI(aURI) {
+  var value = aURI.spec;
+  // Try to decode as UTF-8 if there's no encoding sequence that we would break.
+  if (!/%25(?:3B|2F|3F|3A|40|26|3D|2B|24|2C|23)/i.test(value))
+    try {
+      value = decodeURI(value)
+                // 1. decodeURI decodes %25 to %, which creates unintended
+                //    encoding sequences. Re-encode it, unless it's part of
+                //    a sequence that survived decodeURI, i.e. one for:
+                //    ';', '/', '?', ':', '@', '&', '=', '+', '$', ',', '#'
+                //    (RFC 3987 section 3.2)
+                // 2. Re-encode whitespace so that it doesn't get eaten away
+                //    by the location bar (bug 410726).
+                .replace(/%(?!3B|2F|3F|3A|40|26|3D|2B|24|2C|23)|[\r\n\t]/ig,
+                         encodeURIComponent);
+    } catch (e) {}
+
+  // Encode invisible characters (C0/C1 control characters, U+007F [DEL],
+  // U+00A0 [no-break space], line and paragraph separator,
+  // object replacement character) (bug 452979, bug 909264)
+  value = value.replace(/[\u0000-\u001f\u007f-\u00a0\u2028\u2029\ufffc]/g,
+                        encodeURIComponent);
+
+  // Encode default ignorable characters (bug 546013)
+  // except ZWNJ (U+200C) and ZWJ (U+200D) (bug 582186).
+  // This includes all bidirectional formatting characters.
+  // (RFC 3987 sections 3.2 and 4.1 paragraph 6)
+  value = value.replace(/[\u00ad\u034f\u061c\u115f-\u1160\u17b4-\u17b5\u180b-\u180d\u200b\u200e-\u200f\u202a-\u202e\u2060-\u206f\u3164\ufe00-\ufe0f\ufeff\uffa0\ufff0-\ufff8]|\ud834[\udd73-\udd7a]|[\udb40-\udb43][\udc00-\udfff]/g,
+                        encodeURIComponent);
+  return value;
+}
+
+function UpdateUrlbarSearchSplitterState()
+{
+  var splitter = document.getElementById("urlbar-search-splitter");
+  var urlbar = document.getElementById("urlbar-container");
+  var searchbar = document.getElementById("search-container");
+
+  if (document.documentElement.getAttribute("customizing") == "true") {
+    if (splitter) {
+      splitter.remove();
+    }
+    return;
+  }
+
+  // If the splitter is already in the right place, we don't need to do anything:
+  if (splitter &&
+      ((splitter.nextSibling == searchbar && splitter.previousSibling == urlbar) ||
+       (splitter.nextSibling == urlbar && splitter.previousSibling == searchbar))) {
+    return;
+  }
+
+  var ibefore = null;
+  if (urlbar && searchbar) {
+    if (urlbar.nextSibling == searchbar)
+      ibefore = searchbar;
+    else if (searchbar.nextSibling == urlbar)
+      ibefore = urlbar;
+  }
+
+  if (ibefore) {
+    if (!splitter) {
+      splitter = document.createElement("splitter");
+      splitter.id = "urlbar-search-splitter";
+      splitter.setAttribute("resizebefore", "flex");
+      splitter.setAttribute("resizeafter", "flex");
+      splitter.setAttribute("skipintoolbarset", "true");
+      splitter.setAttribute("overflows", "false");
+      splitter.className = "chromeclass-toolbar-additional";
+    }
+    urlbar.parentNode.insertBefore(splitter, ibefore);
+  } else if (splitter)
+    splitter.parentNode.removeChild(splitter);
+}
+
+function UpdatePageProxyState()
+{
+  if (gURLBar && gURLBar.value != gLastValidURLStr)
+    SetPageProxyState("invalid");
+}
+
+function SetPageProxyState(aState)
+{
+  BookmarkingUI.onPageProxyStateChanged(aState);
+
+  if (!gURLBar)
+    return;
+
+  if (!gProxyFavIcon)
+    gProxyFavIcon = document.getElementById("page-proxy-favicon");
+
+  gURLBar.setAttribute("pageproxystate", aState);
+  gProxyFavIcon.setAttribute("pageproxystate", aState);
+
+  // the page proxy state is set to valid via OnLocationChange, which
+  // gets called when we switch tabs.
+  if (aState == "valid") {
+    gLastValidURLStr = gURLBar.value;
+    gURLBar.addEventListener("input", UpdatePageProxyState, false);
+  } else if (aState == "invalid") {
+    gURLBar.removeEventListener("input", UpdatePageProxyState, false);
+  }
+}
+
+function PageProxyClickHandler(aEvent)
+{
+  if (aEvent.button == 1 && gPrefService.getBoolPref("middlemouse.paste"))
+    middleMousePaste(aEvent);
+}
+
+/**
+ * Handle command events bubbling up from error page content
+ * or from about:newtab
+ */
+let BrowserOnClick = {
+  handleEvent: function BrowserOnClick_handleEvent(aEvent) {
+    if (!aEvent.isTrusted || // Don't trust synthetic events
+        aEvent.button == 2) {
+      return;
+    }
+
+    let originalTarget = aEvent.originalTarget;
+    let ownerDoc = originalTarget.ownerDocument;
+
+    // If the event came from an ssl error page, it is probably either the "Add
+    // Exception…" or "Get me out of here!" button
+    if (ownerDoc.documentURI.startsWith("about:certerror")) {
+      this.onAboutCertError(originalTarget, ownerDoc);
+    }
+    else if (ownerDoc.documentURI.startsWith("about:blocked")) {
+      this.onAboutBlocked(originalTarget, ownerDoc);
+    }
+    else if (ownerDoc.documentURI.startsWith("about:neterror")) {
+      this.onAboutNetError(originalTarget, ownerDoc);
+    }
+    else if (gMultiProcessBrowser &&
+             ownerDoc.documentURI.toLowerCase() == "about:newtab") {
+      this.onE10sAboutNewTab(aEvent, ownerDoc);
+    }
+    else if (ownerDoc.documentURI.startsWith("about:tabcrashed")) {
+      this.onAboutTabCrashed(aEvent, ownerDoc);
+    }
+  },
+
+  onAboutCertError: function BrowserOnClick_onAboutCertError(aTargetElm, aOwnerDoc) {
+    let elmId = aTargetElm.getAttribute("id");
+    let secHistogram = Services.telemetry.getHistogramById("SECURITY_UI");
+    let isTopFrame = (aOwnerDoc.defaultView.parent === aOwnerDoc.defaultView);
+
+    switch (elmId) {
+      case "exceptionDialogButton":
+        if (isTopFrame) {
+          secHistogram.add(Ci.nsISecurityUITelemetry.WARNING_BAD_CERT_TOP_CLICK_ADD_EXCEPTION);
+        }
+        let params = { exceptionAdded : false };
+
+        try {
+          switch (Services.prefs.getIntPref("browser.ssl_override_behavior")) {
+            case 2 : // Pre-fetch & pre-populate
+              params.prefetchCert = true;
+            case 1 : // Pre-populate
+              params.location = aOwnerDoc.location.href;
+          }
+        } catch (e) {
+          Components.utils.reportError("Couldn't get ssl_override pref: " + e);
+        }
+
+        window.openDialog('chrome://pippki/content/exceptionDialog.xul',
+                          '','chrome,centerscreen,modal', params);
+
+        // If the user added the exception cert, attempt to reload the page
+        if (params.exceptionAdded) {
+          aOwnerDoc.location.reload();
+        }
+        break;
+
+      case "getMeOutOfHereButton":
+        if (isTopFrame) {
+          secHistogram.add(Ci.nsISecurityUITelemetry.WARNING_BAD_CERT_TOP_GET_ME_OUT_OF_HERE);
+        }
+        getMeOutOfHere();
+        break;
+
+      case "technicalContent":
+        if (isTopFrame) {
+          secHistogram.add(Ci.nsISecurityUITelemetry.WARNING_BAD_CERT_TOP_TECHNICAL_DETAILS);
+        }
+        break;
+
+      case "expertContent":
+        if (isTopFrame) {
+          secHistogram.add(Ci.nsISecurityUITelemetry.WARNING_BAD_CERT_TOP_UNDERSTAND_RISKS);
+        }
+        break;
+
+    }
+  },
+
+  onAboutBlocked: function BrowserOnClick_onAboutBlocked(aTargetElm, aOwnerDoc) {
+    let elmId = aTargetElm.getAttribute("id");
+    let secHistogram = Services.telemetry.getHistogramById("SECURITY_UI");
+
+    // The event came from a button on a malware/phishing block page
+    // First check whether it's malware or phishing, so that we can
+    // use the right strings/links
+    let isMalware = /e=malwareBlocked/.test(aOwnerDoc.documentURI);
+    let bucketName = isMalware ? "WARNING_MALWARE_PAGE_":"WARNING_PHISHING_PAGE_";
+    let nsISecTel = Ci.nsISecurityUITelemetry;
+    let isIframe = (aOwnerDoc.defaultView.parent === aOwnerDoc.defaultView);
+    bucketName += isIframe ? "TOP_" : "FRAME_";
+
+    switch (elmId) {
+      case "getMeOutButton":
+        secHistogram.add(nsISecTel[bucketName + "GET_ME_OUT_OF_HERE"]);
+        getMeOutOfHere();
+        break;
+
+      case "reportButton":
+        // This is the "Why is this site blocked" button.  For malware,
+        // we can fetch a site-specific report, for phishing, we redirect
+        // to the generic page describing phishing protection.
+
+        // We log even if malware/phishing info URL couldn't be found:
+        // the measurement is for how many users clicked the WHY BLOCKED button
+        secHistogram.add(nsISecTel[bucketName + "WHY_BLOCKED"]);
+
+        if (isMalware) {
+          // Get the stop badware "why is this blocked" report url,
+          // append the current url, and go there.
+          try {
+            let reportURL = formatURL("browser.safebrowsing.malware.reportURL", true);
+            reportURL += aOwnerDoc.location.href;
+            content.location = reportURL;
+          } catch (e) {
+            Components.utils.reportError("Couldn't get malware report URL: " + e);
+          }
+        }
+        else { // It's a phishing site, not malware
+          openHelpLink("phishing-malware", false, "current");
+        }
+        break;
+
+      case "ignoreWarningButton":
+        secHistogram.add(nsISecTel[bucketName + "IGNORE_WARNING"]);
+        this.ignoreWarningButton(isMalware);
+        break;
+    }
+  },
+
+  /**
+   * This functions prevents navigation from happening directly through the <a>
+   * link in about:newtab (which is loaded in the parent and therefore would load
+   * the next page also in the parent) and instructs the browser to open the url
+   * in the current tab which will make it update the remoteness of the tab.
+   */
+  onE10sAboutNewTab: function(aEvent, aOwnerDoc) {
+    let isTopFrame = (aOwnerDoc.defaultView.parent === aOwnerDoc.defaultView);
+    if (!isTopFrame || aEvent.button != 0) {
+      return;
+    }
+
+    let anchorTarget = aEvent.originalTarget.parentNode;
+
+    if (anchorTarget instanceof HTMLAnchorElement &&
+        anchorTarget.classList.contains("newtab-link")) {
+      aEvent.preventDefault();
+      openUILinkIn(anchorTarget.href, "current");
+    }
+  },
+
+  /**
+   * The about:tabcrashed can't do window.reload() because that
+   * would reload the page but not use a remote browser.
+   */
+  onAboutTabCrashed: function(aEvent, aOwnerDoc) {
+    let isTopFrame = (aOwnerDoc.defaultView.parent === aOwnerDoc.defaultView);
+    if (!isTopFrame) {
+      return;
+    }
+
+    let button = aEvent.originalTarget;
+    if (button.id == "tryAgain") {
+#ifdef MOZ_CRASHREPORTER
+      if (aOwnerDoc.getElementById("checkSendReport").checked) {
+        let browser = gBrowser.getBrowserForDocument(aOwnerDoc);
+        TabCrashReporter.submitCrashReport(browser);
+      }
+#endif
+      openUILinkIn(button.getAttribute("url"), "current");
+    }
+  },
+
+  ignoreWarningButton: function BrowserOnClick_ignoreWarningButton(aIsMalware) {
+    // Allow users to override and continue through to the site,
+    // but add a notify bar as a reminder, so that they don't lose
+    // track after, e.g., tab switching.
+    gBrowser.loadURIWithFlags(content.location.href,
+                              nsIWebNavigation.LOAD_FLAGS_BYPASS_CLASSIFIER,
+                              null, null, null);
+
+    Services.perms.add(makeURI(content.location.href), "safe-browsing",
+                       Ci.nsIPermissionManager.ALLOW_ACTION,
+                       Ci.nsIPermissionManager.EXPIRE_SESSION);
+
+    let buttons = [{
+      label: gNavigatorBundle.getString("safebrowsing.getMeOutOfHereButton.label"),
+      accessKey: gNavigatorBundle.getString("safebrowsing.getMeOutOfHereButton.accessKey"),
+      callback: function() { getMeOutOfHere(); }
+    }];
+
+    let title;
+    if (aIsMalware) {
+      title = gNavigatorBundle.getString("safebrowsing.reportedAttackSite");
+      buttons[1] = {
+        label: gNavigatorBundle.getString("safebrowsing.notAnAttackButton.label"),
+        accessKey: gNavigatorBundle.getString("safebrowsing.notAnAttackButton.accessKey"),
+        callback: function() {
+          openUILinkIn(gSafeBrowsing.getReportURL('MalwareError'), 'tab');
+        }
+      };
+    } else {
+      title = gNavigatorBundle.getString("safebrowsing.reportedWebForgery");
+      buttons[1] = {
+        label: gNavigatorBundle.getString("safebrowsing.notAForgeryButton.label"),
+        accessKey: gNavigatorBundle.getString("safebrowsing.notAForgeryButton.accessKey"),
+        callback: function() {
+          openUILinkIn(gSafeBrowsing.getReportURL('Error'), 'tab');
+        }
+      };
+    }
+
+    let notificationBox = gBrowser.getNotificationBox();
+    let value = "blocked-badware-page";
+
+    let previousNotification = notificationBox.getNotificationWithValue(value);
+    if (previousNotification) {
+      notificationBox.removeNotification(previousNotification);
+    }
+
+    let notification = notificationBox.appendNotification(
+      title,
+      value,
+      "chrome://global/skin/icons/blacklist_favicon.png",
+      notificationBox.PRIORITY_CRITICAL_HIGH,
+      buttons
+    );
+    // Persist the notification until the user removes so it
+    // doesn't get removed on redirects.
+    notification.persistence = -1;
+  },
+
+  onAboutNetError: function BrowserOnClick_onAboutNetError(aTargetElm, aOwnerDoc) {
+    let elmId = aTargetElm.getAttribute("id");
+    if (elmId != "errorTryAgain" || !/e=netOffline/.test(aOwnerDoc.documentURI))
+      return;
+    Services.io.offline = false;
+  },
+};
+
+/**
+ * Re-direct the browser to a known-safe page.  This function is
+ * used when, for example, the user browses to a known malware page
+ * and is presented with about:blocked.  The "Get me out of here!"
+ * button should take the user to the default start page so that even
+ * when their own homepage is infected, we can get them somewhere safe.
+ */
+function getMeOutOfHere() {
+  // Get the start page from the *default* pref branch, not the user's
+  var prefs = Services.prefs.getDefaultBranch(null);
+  var url = BROWSER_NEW_TAB_URL;
+  try {
+    url = prefs.getComplexValue("browser.startup.homepage",
+                                Ci.nsIPrefLocalizedString).data;
+    // If url is a pipe-delimited set of pages, just take the first one.
+    if (url.contains("|"))
+      url = url.split("|")[0];
+  } catch(e) {
+    Components.utils.reportError("Couldn't get homepage pref: " + e);
+  }
+  content.location = url;
+}
+
+function BrowserFullScreen()
+{
+  window.fullScreen = !window.fullScreen;
+}
+
+function _checkDefaultAndSwitchToMetro() {
+#ifdef HAVE_SHELL_SERVICE
+#ifdef XP_WIN
+#ifdef MOZ_METRO
+  let shell = Components.classes["@mozilla.org/browser/shell-service;1"].
+    getService(Components.interfaces.nsIShellService);
+  let isDefault = shell.isDefaultBrowser(false, false);
+
+  if (isDefault) {
+    let appStartup = Components.classes["@mozilla.org/toolkit/app-startup;1"].
+    getService(Components.interfaces.nsIAppStartup);
+
+    Services.prefs.setBoolPref('browser.sessionstore.resume_session_once', true);
+
+    let cancelQuit = Cc["@mozilla.org/supports-PRBool;1"]
+                     .createInstance(Ci.nsISupportsPRBool);
+    Services.obs.notifyObservers(cancelQuit, "quit-application-requested", "restart");
+
+    if (!cancelQuit.data) {
+      appStartup.quit(Components.interfaces.nsIAppStartup.eAttemptQuit |
+                      Components.interfaces.nsIAppStartup.eRestartTouchEnvironment);
+    }
+    return true;
+  }
+  return false;
+#endif
+#endif
+#endif
+}
+
+function SwitchToMetro() {
+#ifdef HAVE_SHELL_SERVICE
+#ifdef XP_WIN
+#ifdef MOZ_METRO
+  if (this._checkDefaultAndSwitchToMetro()) {
+    return;
+  }
+
+  let shell = Components.classes["@mozilla.org/browser/shell-service;1"].
+    getService(Components.interfaces.nsIShellService);
+
+  shell.setDefaultBrowser(false, false);
+
+  let intervalID = window.setInterval(this._checkDefaultAndSwitchToMetro, 1000);
+  window.setTimeout(function() { window.clearInterval(intervalID); }, 10000);
+#endif
+#endif
+#endif
+}
+
+function onFullScreen(event) {
+  FullScreen.toggle(event);
+}
+
+function onMozEnteredDomFullscreen(event) {
+  FullScreen.enterDomFullscreen(event);
+}
+
+function getWebNavigation()
+{
+  return gBrowser.webNavigation;
+}
+
+function BrowserReloadWithFlags(reloadFlags) {
+  let url = gBrowser.currentURI.spec;
+  if (gBrowser.updateBrowserRemoteness(gBrowser.selectedBrowser, url)) {
+    // If the remoteness has changed, the new browser doesn't have any
+    // information of what was loaded before, so we need to load the previous
+    // URL again.
+    gBrowser.loadURIWithFlags(url, reloadFlags);
+    return;
+  }
+
+  /* First, we'll try to use the session history object to reload so
+   * that framesets are handled properly. If we're in a special
+   * window (such as view-source) that has no session history, fall
+   * back on using the web navigation's reload method.
+   */
+
+  var webNav = gBrowser.webNavigation;
+  try {
+    var sh = webNav.sessionHistory;
+    if (sh)
+      webNav = sh.QueryInterface(nsIWebNavigation);
+  } catch (e) {
+  }
+
+  try {
+    webNav.reload(reloadFlags);
+  } catch (e) {
+  }
+}
+
+var PrintPreviewListener = {
+  _printPreviewTab: null,
+  _tabBeforePrintPreview: null,
+
+  getPrintPreviewBrowser: function () {
+    if (!this._printPreviewTab) {
+      this._tabBeforePrintPreview = gBrowser.selectedTab;
+      this._printPreviewTab = gBrowser.loadOneTab("about:blank",
+                                                  { inBackground: false });
+      gBrowser.selectedTab = this._printPreviewTab;
+    }
+    return gBrowser.getBrowserForTab(this._printPreviewTab);
+  },
+  getSourceBrowser: function () {
+    return this._tabBeforePrintPreview ?
+      this._tabBeforePrintPreview.linkedBrowser : gBrowser.selectedBrowser;
+  },
+  getNavToolbox: function () {
+    return gNavToolbox;
+  },
+  onEnter: function () {
+    gInPrintPreviewMode = true;
+    this._toggleAffectedChrome();
+  },
+  onExit: function () {
+    gBrowser.selectedTab = this._tabBeforePrintPreview;
+    this._tabBeforePrintPreview = null;
+    gInPrintPreviewMode = false;
+    this._toggleAffectedChrome();
+    gBrowser.removeTab(this._printPreviewTab);
+    this._printPreviewTab = null;
+  },
+  _toggleAffectedChrome: function () {
+    gNavToolbox.collapsed = gInPrintPreviewMode;
+
+    if (gInPrintPreviewMode)
+      this._hideChrome();
+    else
+      this._showChrome();
+
+    if (this._chromeState.sidebarOpen)
+      toggleSidebar(this._sidebarCommand);
+
+    TabsInTitlebar.allowedBy("print-preview", !gInPrintPreviewMode);
+  },
+  _hideChrome: function () {
+    this._chromeState = {};
+
+    var sidebar = document.getElementById("sidebar-box");
+    this._chromeState.sidebarOpen = !sidebar.hidden;
+    this._sidebarCommand = sidebar.getAttribute("sidebarcommand");
+
+    var notificationBox = gBrowser.getNotificationBox();
+    this._chromeState.notificationsOpen = !notificationBox.notificationsHidden;
+    notificationBox.notificationsHidden = true;
+
+    document.getElementById("sidebar").setAttribute("src", "about:blank");
+    gBrowser.updateWindowResizers();
+
+    this._chromeState.findOpen = gFindBarInitialized && !gFindBar.hidden;
+    if (gFindBarInitialized)
+      gFindBar.close();
+
+    var globalNotificationBox = document.getElementById("global-notificationbox");
+    this._chromeState.globalNotificationsOpen = !globalNotificationBox.notificationsHidden;
+    globalNotificationBox.notificationsHidden = true;
+
+    this._chromeState.syncNotificationsOpen = false;
+    var syncNotifications = document.getElementById("sync-notifications");
+    if (syncNotifications) {
+      this._chromeState.syncNotificationsOpen = !syncNotifications.notificationsHidden;
+      syncNotifications.notificationsHidden = true;
+    }
+  },
+  _showChrome: function () {
+    if (this._chromeState.notificationsOpen)
+      gBrowser.getNotificationBox().notificationsHidden = false;
+
+    if (this._chromeState.findOpen)
+      gFindBar.open();
+
+    if (this._chromeState.globalNotificationsOpen)
+      document.getElementById("global-notificationbox").notificationsHidden = false;
+
+    if (this._chromeState.syncNotificationsOpen)
+      document.getElementById("sync-notifications").notificationsHidden = false;
+  }
+}
+
+function getMarkupDocumentViewer()
+{
+  return gBrowser.markupDocumentViewer;
+}
+
+// This function is obsolete. Newer code should use <tooltip page="true"/> instead.
+function FillInHTMLTooltip(tipElement)
+{
+  document.getElementById("aHTMLTooltip").fillInPageTooltip(tipElement);
+}
+
+var browserDragAndDrop = {
+  canDropLink: function (aEvent) Services.droppedLinkHandler.canDropLink(aEvent, true),
+
+  dragOver: function (aEvent)
+  {
+    if (this.canDropLink(aEvent)) {
+      aEvent.preventDefault();
+    }
+  },
+
+  drop: function (aEvent, aName, aDisallowInherit) {
+    return Services.droppedLinkHandler.dropLink(aEvent, aName, aDisallowInherit);
+  }
+};
+
+var homeButtonObserver = {
+  onDrop: function (aEvent)
+    {
+      // disallow setting home pages that inherit the principal
+      let url = browserDragAndDrop.drop(aEvent, {}, true);
+      setTimeout(openHomeDialog, 0, url);
+    },
+
+  onDragOver: function (aEvent)
+    {
+      browserDragAndDrop.dragOver(aEvent);
+      aEvent.dropEffect = "link";
+    },
+  onDragExit: function (aEvent)
+    {
+    }
+}
+
+function openHomeDialog(aURL)
+{
+  var promptTitle = gNavigatorBundle.getString("droponhometitle");
+  var promptMsg   = gNavigatorBundle.getString("droponhomemsg");
+  var pressedVal  = Services.prompt.confirmEx(window, promptTitle, promptMsg,
+                          Services.prompt.STD_YES_NO_BUTTONS,
+                          null, null, null, null, {value:0});
+
+  if (pressedVal == 0) {
+    try {
+      var str = Components.classes["@mozilla.org/supports-string;1"]
+                          .createInstance(Components.interfaces.nsISupportsString);
+      str.data = aURL;
+      gPrefService.setComplexValue("browser.startup.homepage",
+                                   Components.interfaces.nsISupportsString, str);
+    } catch (ex) {
+      dump("Failed to set the home page.\n"+ex+"\n");
+    }
+  }
+}
+
+var newTabButtonObserver = {
+  onDragOver: function (aEvent)
+  {
+    browserDragAndDrop.dragOver(aEvent);
+  },
+
+  onDragExit: function (aEvent)
+  {
+  },
+
+  onDrop: function (aEvent)
+  {
+    let url = browserDragAndDrop.drop(aEvent, { });
+    getShortcutOrURIAndPostData(url, data => {
+      if (data.url) {
+        // allow third-party services to fixup this URL
+        openNewTabWith(data.url, null, data.postData, aEvent, true);
+      }
+    });
+  }
+}
+
+var newWindowButtonObserver = {
+  onDragOver: function (aEvent)
+  {
+    browserDragAndDrop.dragOver(aEvent);
+  },
+  onDragExit: function (aEvent)
+  {
+  },
+  onDrop: function (aEvent)
+  {
+    let url = browserDragAndDrop.drop(aEvent, { });
+    getShortcutOrURIAndPostData(url, data => {
+      if (data.url) {
+        // allow third-party services to fixup this URL
+        openNewWindowWith(data.url, null, data.postData, true);
+      }
+    });
+  }
+}
+
+const DOMLinkHandler = {
+  init: function() {
+    let mm = window.messageManager;
+    mm.addMessageListener("Link:AddFeed", this);
+    mm.addMessageListener("Link:AddIcon", this);
+    mm.addMessageListener("Link:AddSearch", this);
+  },
+
+  receiveMessage: function (aMsg) {
+    switch (aMsg.name) {
+      case "Link:AddFeed":
+        let link = {type: aMsg.data.type, href: aMsg.data.href, title: aMsg.data.title};
+        FeedHandler.addFeed(link, aMsg.target);
+        break;
+
+      case "Link:AddIcon":
+        return this.addIcon(aMsg.target, aMsg.data.url);
+        break;
+
+      case "Link:AddSearch":
+        this.addSearch(aMsg.target, aMsg.data.engine, aMsg.data.url);
+        break;
+    }
+  },
+
+  addIcon: function(aBrowser, aURL) {
+    if (gBrowser.isFailedIcon(aURL))
+      return false;
+
+    let tab = gBrowser._getTabForBrowser(aBrowser);
+    if (!tab)
+      return false;
+
+    gBrowser.setIcon(tab, aURL);
+    return true;
+  },
+
+  addSearch: function(aBrowser, aEngine, aURL) {
+    let tab = gBrowser._getTabForBrowser(aBrowser);
+    if (!tab)
+      return false;
+
+    BrowserSearch.addEngine(aBrowser, aEngine, makeURI(aURL));
+  },
+}
+
+const BrowserSearch = {
+  addEngine: function(browser, engine, uri) {
+    if (!this.searchBar)
+      return;
+
+    // Check to see whether we've already added an engine with this title
+    if (browser.engines) {
+      if (browser.engines.some(function (e) e.title == engine.title))
+        return;
+    }
+
+    // Append the URI and an appropriate title to the browser data.
+    // Use documentURIObject in the check for shouldLoadFavIcon so that we
+    // do the right thing with about:-style error pages.  Bug 453442
+    var iconURL = null;
+    if (gBrowser.shouldLoadFavIcon(uri))
+      iconURL = uri.prePath + "/favicon.ico";
+
+    var hidden = false;
+    // If this engine (identified by title) is already in the list, add it
+    // to the list of hidden engines rather than to the main list.
+    // XXX This will need to be changed when engines are identified by URL;
+    // see bug 335102.
+    if (Services.search.getEngineByName(engine.title))
+      hidden = true;
+
+    var engines = (hidden ? browser.hiddenEngines : browser.engines) || [];
+
+    engines.push({ uri: engine.href,
+                   title: engine.title,
+                   icon: iconURL });
+
+    if (hidden)
+      browser.hiddenEngines = engines;
+    else
+      browser.engines = engines;
+  },
+
+  /**
+   * Gives focus to the search bar, if it is present on the toolbar, or loads
+   * the default engine's search form otherwise. For Mac, opens a new window
+   * or focuses an existing window, if necessary.
+   */
+  webSearch: function BrowserSearch_webSearch() {
+#ifdef XP_MACOSX
+    if (window.location.href != getBrowserURL()) {
+      var win = getTopWin();
+      if (win) {
+        // If there's an open browser window, it should handle this command
+        win.focus();
+        win.BrowserSearch.webSearch();
+      } else {
+        // If there are no open browser windows, open a new one
+        var observer = function observer(subject, topic, data) {
+          if (subject == win) {
+            BrowserSearch.webSearch();
+            Services.obs.removeObserver(observer, "browser-delayed-startup-finished");
+          }
+        }
+        win = window.openDialog(getBrowserURL(), "_blank",
+                                "chrome,all,dialog=no", "about:blank");
+        Services.obs.addObserver(observer, "browser-delayed-startup-finished", false);
+      }
+      return;
+    }
+#endif
+    let openSearchPageIfFieldIsNotActive = function(aSearchBar) {
+      if (!aSearchBar || document.activeElement != aSearchBar.textbox.inputField)
+        openUILinkIn("about:home", "current");
+    };
+
+    let searchBar = this.searchBar;
+    let placement = CustomizableUI.getPlacementOfWidget("search-container");
+    let focusSearchBar = () => {
+      searchBar = this.searchBar;
+      searchBar.select();
+      openSearchPageIfFieldIsNotActive(searchBar);
+    };
+    if (placement && placement.area == CustomizableUI.AREA_PANEL) {
+      // The panel is not constructed until the first time it is shown.
+      PanelUI.show().then(focusSearchBar);
+      return;
+    }
+    if (placement && placement.area == CustomizableUI.AREA_NAVBAR && searchBar &&
+        searchBar.parentNode.getAttribute("overflowedItem") == "true") {
+      let navBar = document.getElementById(CustomizableUI.AREA_NAVBAR);
+      navBar.overflowable.show().then(() => {
+        focusSearchBar();
+      });
+      return;
+    }
+    if (searchBar) {
+      if (window.fullScreen)
+        FullScreen.mouseoverToggle(true);
+      searchBar.select();
+    }
+    openSearchPageIfFieldIsNotActive(searchBar);
+  },
+
+  /**
+   * Loads a search results page, given a set of search terms. Uses the current
+   * engine if the search bar is visible, or the default engine otherwise.
+   *
+   * @param searchText
+   *        The search terms to use for the search.
+   *
+   * @param useNewTab
+   *        Boolean indicating whether or not the search should load in a new
+   *        tab.
+   *
+   * @param purpose [optional]
+   *        A string meant to indicate the context of the search request. This
+   *        allows the search service to provide a different nsISearchSubmission
+   *        depending on e.g. where the search is triggered in the UI.
+   *
+   * @return engine The search engine used to perform a search, or null if no
+   *                search was performed.
+   */
+  _loadSearch: function (searchText, useNewTab, purpose) {
+    let engine;
+
+    // If the search bar is visible, use the current engine, otherwise, fall
+    // back to the default engine.
+    if (isElementVisible(this.searchBar))
+      engine = Services.search.currentEngine;
+    else
+      engine = Services.search.defaultEngine;
+
+    let submission = engine.getSubmission(searchText, null, purpose); // HTML response
+
+    // getSubmission can return null if the engine doesn't have a URL
+    // with a text/html response type.  This is unlikely (since
+    // SearchService._addEngineToStore() should fail for such an engine),
+    // but let's be on the safe side.
+    if (!submission) {
+      return null;
+    }
+
+    let inBackground = Services.prefs.getBoolPref("browser.search.context.loadInBackground");
+    openLinkIn(submission.uri.spec,
+               useNewTab ? "tab" : "current",
+               { postData: submission.postData,
+                 inBackground: inBackground,
+                 relatedToCurrent: true });
+
+    return engine;
+  },
+
+  /**
+   * Just like _loadSearch, but preserving an old API.
+   *
+   * @return string Name of the search engine used to perform a search or null
+   *         if a search was not performed.
+   */
+  loadSearch: function BrowserSearch_search(searchText, useNewTab, purpose) {
+    let engine = BrowserSearch._loadSearch(searchText, useNewTab, purpose);
+    if (!engine) {
+      return null;
+    }
+    return engine.name;
+  },
+
+  /**
+   * Perform a search initiated from the context menu.
+   *
+   * This should only be called from the context menu. See
+   * BrowserSearch.loadSearch for the preferred API.
+   */
+  loadSearchFromContext: function (terms) {
+    let engine = BrowserSearch._loadSearch(terms, true, "contextmenu");
+    if (engine) {
+      BrowserSearch.recordSearchInHealthReport(engine, "contextmenu");
+    }
+  },
+
+  /**
+   * Returns the search bar element if it is present in the toolbar, null otherwise.
+   */
+  get searchBar() {
+    return document.getElementById("searchbar");
+  },
+
+  loadAddEngines: function BrowserSearch_loadAddEngines() {
+    var newWindowPref = gPrefService.getIntPref("browser.link.open_newwindow");
+    var where = newWindowPref == 3 ? "tab" : "window";
+    var searchEnginesURL = formatURL("browser.search.searchEnginesURL", true);
+    openUILinkIn(searchEnginesURL, where);
+  },
+
+  /**
+   * Helper to record a search with Firefox Health Report.
+   *
+   * FHR records only search counts and nothing pertaining to the search itself.
+   *
+   * @param engine
+   *        (nsISearchEngine) The engine handling the search.
+   * @param source
+   *        (string) Where the search originated from. See the FHR
+   *        SearchesProvider for allowed values.
+   */
+  recordSearchInHealthReport: function (engine, source) {
+#ifdef MOZ_SERVICES_HEALTHREPORT
+    let reporter = Cc["@mozilla.org/datareporting/service;1"]
+                     .getService()
+                     .wrappedJSObject
+                     .healthReporter;
+
+    // This can happen if the FHR component of the data reporting service is
+    // disabled. This is controlled by a pref that most will never use.
+    if (!reporter) {
+      return;
+    }
+
+    reporter.onInit().then(function record() {
+      try {
+        reporter.getProvider("org.mozilla.searches").recordSearch(engine, source);
+      } catch (ex) {
+        Cu.reportError(ex);
+      }
+    });
+#endif
+  },
+};
+
+function FillHistoryMenu(aParent) {
+  // Lazily add the hover listeners on first showing and never remove them
+  if (!aParent.hasStatusListener) {
+    // Show history item's uri in the status bar when hovering, and clear on exit
+    aParent.addEventListener("DOMMenuItemActive", function(aEvent) {
+      // Only the current page should have the checked attribute, so skip it
+      if (!aEvent.target.hasAttribute("checked"))
+        XULBrowserWindow.setOverLink(aEvent.target.getAttribute("uri"));
+    }, false);
+    aParent.addEventListener("DOMMenuItemInactive", function() {
+      XULBrowserWindow.setOverLink("");
+    }, false);
+
+    aParent.hasStatusListener = true;
+  }
+
+  // Remove old entries if any
+  var children = aParent.childNodes;
+  for (var i = children.length - 1; i >= 0; --i) {
+    if (children[i].hasAttribute("index"))
+      aParent.removeChild(children[i]);
+  }
+
+  var webNav = gBrowser.webNavigation;
+  var sessionHistory = webNav.sessionHistory;
+
+  var count = sessionHistory.count;
+  if (count <= 1) // don't display the popup for a single item
+    return false;
+
+  const MAX_HISTORY_MENU_ITEMS = 15;
+  var index = sessionHistory.index;
+  var half_length = Math.floor(MAX_HISTORY_MENU_ITEMS / 2);
+  var start = Math.max(index - half_length, 0);
+  var end = Math.min(start == 0 ? MAX_HISTORY_MENU_ITEMS : index + half_length + 1, count);
+  if (end == count)
+    start = Math.max(count - MAX_HISTORY_MENU_ITEMS, 0);
+
+  var tooltipBack = gNavigatorBundle.getString("tabHistory.goBack");
+  var tooltipCurrent = gNavigatorBundle.getString("tabHistory.current");
+  var tooltipForward = gNavigatorBundle.getString("tabHistory.goForward");
+
+  for (var j = end - 1; j >= start; j--) {
+    let item = document.createElement("menuitem");
+    let entry = sessionHistory.getEntryAtIndex(j, false);
+    let uri = entry.URI.spec;
+
+    item.setAttribute("uri", uri);
+    item.setAttribute("label", entry.title || uri);
+    item.setAttribute("index", j);
+
+    if (j != index) {
+      PlacesUtils.favicons.getFaviconURLForPage(entry.URI, function (aURI) {
+        if (aURI) {
+          let iconURL = PlacesUtils.favicons.getFaviconLinkForIcon(aURI).spec;
+          item.style.listStyleImage = "url(" + iconURL + ")";
+        }
+      });
+    }
+
+    if (j < index) {
+      item.className = "unified-nav-back menuitem-iconic menuitem-with-favicon";
+      item.setAttribute("tooltiptext", tooltipBack);
+    } else if (j == index) {
+      item.setAttribute("type", "radio");
+      item.setAttribute("checked", "true");
+      item.className = "unified-nav-current";
+      item.setAttribute("tooltiptext", tooltipCurrent);
+    } else {
+      item.className = "unified-nav-forward menuitem-iconic menuitem-with-favicon";
+      item.setAttribute("tooltiptext", tooltipForward);
+    }
+
+    aParent.appendChild(item);
+  }
+  return true;
+}
+
+function addToUrlbarHistory(aUrlToAdd) {
+  if (!PrivateBrowsingUtils.isWindowPrivate(window) &&
+      aUrlToAdd &&
+      !aUrlToAdd.contains(" ") &&
+      !/[\x00-\x1F]/.test(aUrlToAdd))
+    PlacesUIUtils.markPageAsTyped(aUrlToAdd);
+}
+
+function toJavaScriptConsole()
+{
+  toOpenWindowByType("global:console", "chrome://global/content/console.xul");
+}
+
+function BrowserDownloadsUI()
+{
+  Cc["@mozilla.org/download-manager-ui;1"].
+  getService(Ci.nsIDownloadManagerUI).show(window);
+}
+
+function toOpenWindowByType(inType, uri, features)
+{
+  var topWindow = Services.wm.getMostRecentWindow(inType);
+
+  if (topWindow)
+    topWindow.focus();
+  else if (features)
+    window.open(uri, "_blank", features);
+  else
+    window.open(uri, "_blank", "chrome,extrachrome,menubar,resizable,scrollbars,status,toolbar");
+}
+
+function OpenBrowserWindow(options)
+{
+  var telemetryObj = {};
+  TelemetryStopwatch.start("FX_NEW_WINDOW_MS", telemetryObj);
+
+  function newDocumentShown(doc, topic, data) {
+    if (topic == "document-shown" &&
+        doc != document &&
+        doc.defaultView == win) {
+      Services.obs.removeObserver(newDocumentShown, "document-shown");
+      Services.obs.removeObserver(windowClosed, "domwindowclosed");
+      TelemetryStopwatch.finish("FX_NEW_WINDOW_MS", telemetryObj);
+    }
+  }
+
+  function windowClosed(subject) {
+    if (subject == win) {
+      Services.obs.removeObserver(newDocumentShown, "document-shown");
+      Services.obs.removeObserver(windowClosed, "domwindowclosed");
+    }
+  }
+
+  // Make sure to remove the 'document-shown' observer in case the window
+  // is being closed right after it was opened to avoid leaking.
+  Services.obs.addObserver(newDocumentShown, "document-shown", false);
+  Services.obs.addObserver(windowClosed, "domwindowclosed", false);
+
+  var charsetArg = new String();
+  var handler = Components.classes["@mozilla.org/browser/clh;1"]
+                          .getService(Components.interfaces.nsIBrowserHandler);
+  var defaultArgs = handler.defaultArgs;
+  var wintype = document.documentElement.getAttribute('windowtype');
+
+  var extraFeatures = "";
+  if (options && options.private) {
+    extraFeatures = ",private";
+    if (!PrivateBrowsingUtils.permanentPrivateBrowsing) {
+      // Force the new window to load about:privatebrowsing instead of the default home page
+      defaultArgs = "about:privatebrowsing";
+    }
+  } else {
+    extraFeatures = ",non-private";
+  }
+
+  if (options && options.remote) {
+    let omtcEnabled = gPrefService.getBoolPref("layers.offmainthreadcomposition.enabled");
+    if (!omtcEnabled) {
+      alert("To use out-of-process tabs, you must set the layers.offmainthreadcomposition.enabled preference and restart. Opening a normal window instead.");
+    } else {
+      extraFeatures += ",remote";
+    }
+  } else if (options && options.remote === false) {
+    extraFeatures += ",non-remote";
+  }
+
+  // if and only if the current window is a browser window and it has a document with a character
+  // set, then extract the current charset menu setting from the current document and use it to
+  // initialize the new browser window...
+  var win;
+  if (window && (wintype == "navigator:browser") && window.content && window.content.document)
+  {
+    var DocCharset = window.content.document.characterSet;
+    charsetArg = "charset="+DocCharset;
+
+    //we should "inherit" the charset menu setting in a new window
+    win = window.openDialog("chrome://browser/content/", "_blank", "chrome,all,dialog=no" + extraFeatures, defaultArgs, charsetArg);
+  }
+  else // forget about the charset information.
+  {
+    win = window.openDialog("chrome://browser/content/", "_blank", "chrome,all,dialog=no" + extraFeatures, defaultArgs);
+  }
+
+  return win;
+}
+
+// Only here for backwards compat, we should remove this soon
+function BrowserCustomizeToolbar() {
+  gCustomizeMode.enter();
+}
+
+/**
+ * Update the global flag that tracks whether or not any edit UI (the Edit menu,
+ * edit-related items in the context menu, and edit-related toolbar buttons
+ * is visible, then update the edit commands' enabled state accordingly.  We use
+ * this flag to skip updating the edit commands on focus or selection changes
+ * when no UI is visible to improve performance (including pageload performance,
+ * since focus changes when you load a new page).
+ *
+ * If UI is visible, we use goUpdateGlobalEditMenuItems to set the commands'
+ * enabled state so the UI will reflect it appropriately.
+ *
+ * If the UI isn't visible, we enable all edit commands so keyboard shortcuts
+ * still work and just lazily disable them as needed when the user presses a
+ * shortcut.
+ *
+ * This doesn't work on Mac, since Mac menus flash when users press their
+ * keyboard shortcuts, so edit UI is essentially always visible on the Mac,
+ * and we need to always update the edit commands.  Thus on Mac this function
+ * is a no op.
+ */
+function updateEditUIVisibility()
+{
+#ifndef XP_MACOSX
+  let editMenuPopupState = document.getElementById("menu_EditPopup").state;
+  let contextMenuPopupState = document.getElementById("contentAreaContextMenu").state;
+  let placesContextMenuPopupState = document.getElementById("placesContext").state;
+
+  // The UI is visible if the Edit menu is opening or open, if the context menu
+  // is open, or if the toolbar has been customized to include the Cut, Copy,
+  // or Paste toolbar buttons.
+  gEditUIVisible = editMenuPopupState == "showing" ||
+                   editMenuPopupState == "open" ||
+                   contextMenuPopupState == "showing" ||
+                   contextMenuPopupState == "open" ||
+                   placesContextMenuPopupState == "showing" ||
+                   placesContextMenuPopupState == "open" ||
+                   document.getElementById("edit-controls") ? true : false;
+
+  // If UI is visible, update the edit commands' enabled state to reflect
+  // whether or not they are actually enabled for the current focus/selection.
+  if (gEditUIVisible)
+    goUpdateGlobalEditMenuItems();
+
+  // Otherwise, enable all commands, so that keyboard shortcuts still work,
+  // then lazily determine their actual enabled state when the user presses
+  // a keyboard shortcut.
+  else {
+    goSetCommandEnabled("cmd_undo", true);
+    goSetCommandEnabled("cmd_redo", true);
+    goSetCommandEnabled("cmd_cut", true);
+    goSetCommandEnabled("cmd_copy", true);
+    goSetCommandEnabled("cmd_paste", true);
+    goSetCommandEnabled("cmd_selectAll", true);
+    goSetCommandEnabled("cmd_delete", true);
+    goSetCommandEnabled("cmd_switchTextDirection", true);
+  }
+#endif
+}
+
+/**
+ * Makes the Character Encoding menu enabled or disabled as appropriate.
+ * To be called when the View menu or the app menu is opened.
+ */
+function updateCharacterEncodingMenuState()
+{
+  let charsetMenu = document.getElementById("charsetMenu");
+  // gBrowser is null on Mac when the menubar shows in the context of
+  // non-browser windows. The above elements may be null depending on
+  // what parts of the menubar are present. E.g. no app menu on Mac.
+  if (gBrowser &&
+      gBrowser.docShell &&
+      gBrowser.docShell.mayEnableCharacterEncodingMenu) {
+    if (charsetMenu) {
+      charsetMenu.removeAttribute("disabled");
+    }
+  } else {
+    if (charsetMenu) {
+      charsetMenu.setAttribute("disabled", "true");
+    }
+  }
+}
+
+/**
+ * Returns true if |aMimeType| is text-based, false otherwise.
+ *
+ * @param aMimeType
+ *        The MIME type to check.
+ *
+ * If adding types to this function, please also check the similar
+ * function in findbar.xml
+ */
+function mimeTypeIsTextBased(aMimeType)
+{
+  return aMimeType.startsWith("text/") ||
+         aMimeType.endsWith("+xml") ||
+         aMimeType == "application/x-javascript" ||
+         aMimeType == "application/javascript" ||
+         aMimeType == "application/json" ||
+         aMimeType == "application/xml" ||
+         aMimeType == "mozilla.application/cached-xul";
+}
+
+var XULBrowserWindow = {
+  // Stored Status, Link and Loading values
+  status: "",
+  defaultStatus: "",
+  overLink: "",
+  startTime: 0,
+  statusText: "",
+  isBusy: false,
+  // Left here for add-on compatibility, see bug 752434
+  inContentWhitelist: [],
+
+  QueryInterface: function (aIID) {
+    if (aIID.equals(Ci.nsIWebProgressListener) ||
+        aIID.equals(Ci.nsIWebProgressListener2) ||
+        aIID.equals(Ci.nsISupportsWeakReference) ||
+        aIID.equals(Ci.nsIXULBrowserWindow) ||
+        aIID.equals(Ci.nsISupports))
+      return this;
+    throw Cr.NS_NOINTERFACE;
+  },
+
+  get stopCommand () {
+    delete this.stopCommand;
+    return this.stopCommand = document.getElementById("Browser:Stop");
+  },
+  get reloadCommand () {
+    delete this.reloadCommand;
+    return this.reloadCommand = document.getElementById("Browser:Reload");
+  },
+  get statusTextField () {
+    return gBrowser.getStatusPanel();
+  },
+  get isImage () {
+    delete this.isImage;
+    return this.isImage = document.getElementById("isImage");
+  },
+
+  init: function () {
+    // Initialize the security button's state and tooltip text.
+    var securityUI = gBrowser.securityUI;
+    this.onSecurityChange(null, null, securityUI.state);
+  },
+
+  setJSStatus: function () {
+    // unsupported
+  },
+
+  setDefaultStatus: function (status) {
+    this.defaultStatus = status;
+    this.updateStatusField();
+  },
+
+  setOverLink: function (url, anchorElt) {
+    // Encode bidirectional formatting characters.
+    // (RFC 3987 sections 3.2 and 4.1 paragraph 6)
+    url = url.replace(/[\u200e\u200f\u202a\u202b\u202c\u202d\u202e]/g,
+                      encodeURIComponent);
+
+    if (gURLBar && gURLBar._mayTrimURLs /* corresponds to browser.urlbar.trimURLs */)
+      url = trimURL(url);
+
+    this.overLink = url;
+    LinkTargetDisplay.update();
+  },
+
+  showTooltip: function (x, y, tooltip) {
+    // The x,y coordinates are relative to the <browser> element using
+    // the chrome zoom level.
+    let elt = document.getElementById("remoteBrowserTooltip");
+    elt.label = tooltip;
+
+    let anchor = gBrowser.selectedBrowser;
+    elt.openPopupAtScreen(anchor.boxObject.screenX + x, anchor.boxObject.screenY + y, false, null);
+  },
+
+  hideTooltip: function () {
+    let elt = document.getElementById("remoteBrowserTooltip");
+    elt.hidePopup();
+  },
+
+  updateStatusField: function () {
+    var text, type, types = ["overLink"];
+    if (this._busyUI)
+      types.push("status");
+    types.push("defaultStatus");
+    for (type of types) {
+      text = this[type];
+      if (text)
+        break;
+    }
+
+    // check the current value so we don't trigger an attribute change
+    // and cause needless (slow!) UI updates
+    if (this.statusText != text) {
+      let field = this.statusTextField;
+      field.setAttribute("previoustype", field.getAttribute("type"));
+      field.setAttribute("type", type);
+      field.label = text;
+      field.setAttribute("crop", type == "overLink" ? "center" : "end");
+      this.statusText = text;
+    }
+  },
+
+  // Called before links are navigated to to allow us to retarget them if needed.
+  onBeforeLinkTraversal: function(originalTarget, linkURI, linkNode, isAppTab) {
+    let target = this._onBeforeLinkTraversal(originalTarget, linkURI, linkNode, isAppTab);
+    SocialUI.closeSocialPanelForLinkTraversal(target, linkNode);
+    return target;
+  },
+
+  _onBeforeLinkTraversal: function(originalTarget, linkURI, linkNode, isAppTab) {
+    // Don't modify non-default targets or targets that aren't in top-level app
+    // tab docshells (isAppTab will be false for app tab subframes).
+    if (originalTarget != "" || !isAppTab)
+      return originalTarget;
+
+    // External links from within app tabs should always open in new tabs
+    // instead of replacing the app tab's page (Bug 575561)
+    let linkHost;
+    let docHost;
+    try {
+      linkHost = linkURI.host;
+      docHost = linkNode.ownerDocument.documentURIObject.host;
+    } catch(e) {
+      // nsIURI.host can throw for non-nsStandardURL nsIURIs.
+      // If we fail to get either host, just return originalTarget.
+      return originalTarget;
+    }
+
+    if (docHost == linkHost)
+      return originalTarget;
+
+    // Special case: ignore "www" prefix if it is part of host string
+    let [longHost, shortHost] =
+      linkHost.length > docHost.length ? [linkHost, docHost] : [docHost, linkHost];
+    if (longHost == "www." + shortHost)
+      return originalTarget;
+
+    return "_blank";
+  },
+
+  onProgressChange: function (aWebProgress, aRequest,
+                              aCurSelfProgress, aMaxSelfProgress,
+                              aCurTotalProgress, aMaxTotalProgress) {
+    // Do nothing.
+  },
+
+  onProgressChange64: function (aWebProgress, aRequest,
+                                aCurSelfProgress, aMaxSelfProgress,
+                                aCurTotalProgress, aMaxTotalProgress) {
+    return this.onProgressChange(aWebProgress, aRequest,
+      aCurSelfProgress, aMaxSelfProgress, aCurTotalProgress,
+      aMaxTotalProgress);
+  },
+
+  // This function fires only for the currently selected tab.
+  onStateChange: function (aWebProgress, aRequest, aStateFlags, aStatus) {
+    const nsIWebProgressListener = Ci.nsIWebProgressListener;
+    const nsIChannel = Ci.nsIChannel;
+
+    let browser = gBrowser.selectedBrowser;
+
+    if (aStateFlags & nsIWebProgressListener.STATE_START &&
+        aStateFlags & nsIWebProgressListener.STATE_IS_NETWORK) {
+
+      if (aRequest && aWebProgress.isTopLevel) {
+        // clear out feed data
+        browser.feeds = null;
+
+        // clear out search-engine data
+        browser.engines = null;
+      }
+
+      this.isBusy = true;
+
+      if (!(aStateFlags & nsIWebProgressListener.STATE_RESTORING)) {
+        this._busyUI = true;
+
+        // XXX: This needs to be based on window activity...
+        this.stopCommand.removeAttribute("disabled");
+        CombinedStopReload.switchToStop();
+      }
+    }
+    else if (aStateFlags & nsIWebProgressListener.STATE_STOP) {
+      // This (thanks to the filter) is a network stop or the last
+      // request stop outside of loading the document, stop throbbers
+      // and progress bars and such
+      if (aRequest) {
+        let msg = "";
+        let location;
+        // Get the URI either from a channel or a pseudo-object
+        if (aRequest instanceof nsIChannel || "URI" in aRequest) {
+          location = aRequest.URI;
+
+          // For keyword URIs clear the user typed value since they will be changed into real URIs
+          if (location.scheme == "keyword" && aWebProgress.isTopLevel)
+            gBrowser.userTypedValue = null;
+
+          if (location.spec != "about:blank") {
+            switch (aStatus) {
+              case Components.results.NS_ERROR_NET_TIMEOUT:
+                msg = gNavigatorBundle.getString("nv_timeout");
+                break;
+            }
+          }
+        }
+
+        this.status = "";
+        this.setDefaultStatus(msg);
+
+        // Disable menu entries for images, enable otherwise
+        if (browser.documentContentType && mimeTypeIsTextBased(browser.documentContentType))
+          this.isImage.removeAttribute('disabled');
+        else
+          this.isImage.setAttribute('disabled', 'true');
+      }
+
+      this.isBusy = false;
+
+      if (this._busyUI) {
+        this._busyUI = false;
+
+        this.stopCommand.setAttribute("disabled", "true");
+        CombinedStopReload.switchToReload(aRequest instanceof Ci.nsIRequest);
+      }
+    }
+  },
+
+  onLocationChange: function (aWebProgress, aRequest, aLocationURI, aFlags) {
+    var location = aLocationURI ? aLocationURI.spec : "";
+
+    // Hide the form invalid popup.
+    if (gFormSubmitObserver.panel) {
+      gFormSubmitObserver.panel.hidePopup();
+    }
+
+    let pageTooltip = document.getElementById("aHTMLTooltip");
+    let tooltipNode = pageTooltip.triggerNode;
+    if (tooltipNode) {
+      // Optimise for the common case
+      if (aWebProgress.isTopLevel) {
+        pageTooltip.hidePopup();
+      }
+      else {
+        for (let tooltipWindow = tooltipNode.ownerDocument.defaultView;
+             tooltipWindow != tooltipWindow.parent;
+             tooltipWindow = tooltipWindow.parent) {
+          if (tooltipWindow == aWebProgress.DOMWindow) {
+            pageTooltip.hidePopup();
+            break;
+          }
+        }
+      }
+    }
+
+    let browser = gBrowser.selectedBrowser;
+
+    // Disable menu entries for images, enable otherwise
+    if (browser.documentContentType && mimeTypeIsTextBased(browser.documentContentType))
+      this.isImage.removeAttribute('disabled');
+    else
+      this.isImage.setAttribute('disabled', 'true');
+
+    this.hideOverLinkImmediately = true;
+    this.setOverLink("", null);
+    this.hideOverLinkImmediately = false;
+
+    // We should probably not do this if the value has changed since the user
+    // searched
+    // Update urlbar only if a new page was loaded on the primary content area
+    // Do not update urlbar if there was a subframe navigation
+
+    if (aWebProgress.isTopLevel) {
+      if ((location == "about:blank" && (gMultiProcessBrowser || !content.opener)) ||
+          location == "") {  // Second condition is for new tabs, otherwise
+                             // reload function is enabled until tab is refreshed.
+        this.reloadCommand.setAttribute("disabled", "true");
+      } else {
+        this.reloadCommand.removeAttribute("disabled");
+      }
+
+      if (gURLBar) {
+        URLBarSetURI(aLocationURI);
+
+        BookmarkingUI.onLocationChange();
+        SocialUI.updateState();
+      }
+
+      // Utility functions for disabling find
+      var shouldDisableFind = function shouldDisableFind(aDocument) {
+        let docElt = aDocument.documentElement;
+        return docElt && docElt.getAttribute("disablefastfind") == "true";
+      }
+
+      var disableFindCommands = function disableFindCommands(aDisable) {
+        let findCommands = [document.getElementById("cmd_find"),
+                            document.getElementById("cmd_findAgain"),
+                            document.getElementById("cmd_findPrevious")];
+        for (let elt of findCommands) {
+          if (aDisable)
+            elt.setAttribute("disabled", "true");
+          else
+            elt.removeAttribute("disabled");
+        }
+      }
+
+      var onContentRSChange = function onContentRSChange(e) {
+        if (e.target.readyState != "interactive" && e.target.readyState != "complete")
+          return;
+
+        e.target.removeEventListener("readystatechange", onContentRSChange);
+        disableFindCommands(shouldDisableFind(e.target));
+      }
+
+      // Disable find commands in documents that ask for them to be disabled.
+      if (!gMultiProcessBrowser && aLocationURI &&
+          (aLocationURI.schemeIs("about") || aLocationURI.schemeIs("chrome"))) {
+        // Don't need to re-enable/disable find commands for same-document location changes
+        // (e.g. the replaceStates in about:addons)
+        if (!(aFlags & Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT)) {
+          if (content.document.readyState == "interactive" || content.document.readyState == "complete")
+            disableFindCommands(shouldDisableFind(content.document));
+          else {
+            content.document.addEventListener("readystatechange", onContentRSChange);
+          }
+        }
+      } else
+        disableFindCommands(false);
+
+      // Try not to instantiate gCustomizeMode as much as possible,
+      // so don't use CustomizeMode.jsm to check for URI or customizing.
+      let customizingURI = "about:customizing";
+      if (location == customizingURI) {
+        gCustomizeMode.enter();
+      } else if (location != customizingURI &&
+                 (CustomizationHandler.isEnteringCustomizeMode ||
+                  CustomizationHandler.isCustomizing())) {
+        gCustomizeMode.exit();
+      }
+    }
+    UpdateBackForwardCommands(gBrowser.webNavigation);
+
+    gGestureSupport.restoreRotationState();
+
+    // See bug 358202, when tabs are switched during a drag operation,
+    // timers don't fire on windows (bug 203573)
+    if (aRequest)
+      setTimeout(function () { XULBrowserWindow.asyncUpdateUI(); }, 0);
+    else
+      this.asyncUpdateUI();
+
+#ifdef MOZ_CRASHREPORTER
+    if (aLocationURI) {
+      let uri = aLocationURI.clone();
+      try {
+        // If the current URI contains a username/password, remove it.
+        uri.userPass = "";
+      } catch (ex) { /* Ignore failures on about: URIs. */ }
+
+      try {
+        gCrashReporter.annotateCrashReport("URL", uri.spec);
+      } catch (ex if ex.result == Components.results.NS_ERROR_NOT_INITIALIZED) {
+        // Don't make noise when the crash reporter is built but not enabled.
+      }
+    }
+#endif
+  },
+
+  asyncUpdateUI: function () {
+    FeedHandler.updateFeeds();
+  },
+
+  // Left here for add-on compatibility, see bug 752434
+  hideChromeForLocation: function() {},
+
+  onStatusChange: function (aWebProgress, aRequest, aStatus, aMessage) {
+    this.status = aMessage;
+    this.updateStatusField();
+  },
+
+  // Properties used to cache security state used to update the UI
+  _state: null,
+  _lastLocation: null,
+
+  onSecurityChange: function (aWebProgress, aRequest, aState) {
+    // Don't need to do anything if the data we use to update the UI hasn't
+    // changed
+    let uri = gBrowser.currentURI;
+    let spec = uri.spec;
+    if (this._state == aState &&
+        this._lastLocation == spec)
+      return;
+    this._state = aState;
+    this._lastLocation = spec;
+
+    // aState is defined as a bitmask that may be extended in the future.
+    // We filter out any unknown bits before testing for known values.
+    const wpl = Components.interfaces.nsIWebProgressListener;
+    const wpl_security_bits = wpl.STATE_IS_SECURE |
+                              wpl.STATE_IS_BROKEN |
+                              wpl.STATE_IS_INSECURE;
+    var level;
+
+    switch (this._state & wpl_security_bits) {
+      case wpl.STATE_IS_SECURE:
+        level = "high";
+        break;
+      case wpl.STATE_IS_BROKEN:
+        level = "broken";
+        break;
+    }
+
+    if (level) {
+      // We don't style the Location Bar based on the the 'level' attribute
+      // anymore, but still set it for third-party themes.
+      if (gURLBar)
+        gURLBar.setAttribute("level", level);
+    } else {
+      if (gURLBar)
+        gURLBar.removeAttribute("level");
+    }
+
+    try {
+      uri = Services.uriFixup.createExposableURI(uri);
+    } catch (e) {}
+    gIdentityHandler.checkIdentity(this._state, uri);
+  },
+
+  // simulate all change notifications after switching tabs
+  onUpdateCurrentBrowser: function XWB_onUpdateCurrentBrowser(aStateFlags, aStatus, aMessage, aTotalProgress) {
+    if (FullZoom.updateBackgroundTabs)
+      FullZoom.onLocationChange(gBrowser.currentURI, true);
+    var nsIWebProgressListener = Components.interfaces.nsIWebProgressListener;
+    var loadingDone = aStateFlags & nsIWebProgressListener.STATE_STOP;
+    // use a pseudo-object instead of a (potentially nonexistent) channel for getting
+    // a correct error message - and make sure that the UI is always either in
+    // loading (STATE_START) or done (STATE_STOP) mode
+    this.onStateChange(
+      gBrowser.webProgress,
+      { URI: gBrowser.currentURI },
+      loadingDone ? nsIWebProgressListener.STATE_STOP : nsIWebProgressListener.STATE_START,
+      aStatus
+    );
+    // status message and progress value are undefined if we're done with loading
+    if (loadingDone)
+      return;
+    this.onStatusChange(gBrowser.webProgress, null, 0, aMessage);
+  }
+};
+
+var LinkTargetDisplay = {
+  get DELAY_SHOW() {
+     delete this.DELAY_SHOW;
+     return this.DELAY_SHOW = Services.prefs.getIntPref("browser.overlink-delay");
+  },
+
+  DELAY_HIDE: 250,
+  _timer: 0,
+
+  get _isVisible () XULBrowserWindow.statusTextField.label != "",
+
+  update: function () {
+    clearTimeout(this._timer);
+    window.removeEventListener("mousemove", this, true);
+
+    if (!XULBrowserWindow.overLink) {
+      if (XULBrowserWindow.hideOverLinkImmediately)
+        this._hide();
+      else
+        this._timer = setTimeout(this._hide.bind(this), this.DELAY_HIDE);
+      return;
+    }
+
+    if (this._isVisible) {
+      XULBrowserWindow.updateStatusField();
+    } else {
+      // Let the display appear when the mouse doesn't move within the delay
+      this._showDelayed();
+      window.addEventListener("mousemove", this, true);
+    }
+  },
+
+  handleEvent: function (event) {
+    switch (event.type) {
+      case "mousemove":
+        // Restart the delay since the mouse was moved
+        clearTimeout(this._timer);
+        this._showDelayed();
+        break;
+    }
+  },
+
+  _showDelayed: function () {
+    this._timer = setTimeout(function (self) {
+      XULBrowserWindow.updateStatusField();
+      window.removeEventListener("mousemove", self, true);
+    }, this.DELAY_SHOW, this);
+  },
+
+  _hide: function () {
+    clearTimeout(this._timer);
+
+    XULBrowserWindow.updateStatusField();
+  }
+};
+
+var CombinedStopReload = {
+  init: function () {
+    if (this._initialized)
+      return;
+
+    let reload = document.getElementById("urlbar-reload-button");
+    let stop = document.getElementById("urlbar-stop-button");
+    if (!stop || !reload || reload.nextSibling != stop)
+      return;
+
+    this._initialized = true;
+    if (XULBrowserWindow.stopCommand.getAttribute("disabled") != "true")
+      reload.setAttribute("displaystop", "true");
+    stop.addEventListener("click", this, false);
+    this.reload = reload;
+    this.stop = stop;
+  },
+
+  uninit: function () {
+    if (!this._initialized)
+      return;
+
+    this._cancelTransition();
+    this._initialized = false;
+    this.stop.removeEventListener("click", this, false);
+    this.reload = null;
+    this.stop = null;
+  },
+
+  handleEvent: function (event) {
+    // the only event we listen to is "click" on the stop button
+    if (event.button == 0 &&
+        !this.stop.disabled)
+      this._stopClicked = true;
+  },
+
+  switchToStop: function () {
+    if (!this._initialized)
+      return;
+
+    this._cancelTransition();
+    this.reload.setAttribute("displaystop", "true");
+  },
+
+  switchToReload: function (aDelay) {
+    if (!this._initialized)
+      return;
+
+    this.reload.removeAttribute("displaystop");
+
+    if (!aDelay || this._stopClicked) {
+      this._stopClicked = false;
+      this._cancelTransition();
+      this.reload.disabled = XULBrowserWindow.reloadCommand
+                                             .getAttribute("disabled") == "true";
+      return;
+    }
+
+    if (this._timer)
+      return;
+
+    // Temporarily disable the reload button to prevent the user from
+    // accidentally reloading the page when intending to click the stop button
+    this.reload.disabled = true;
+    this._timer = setTimeout(function (self) {
+      self._timer = 0;
+      self.reload.disabled = XULBrowserWindow.reloadCommand
+                                             .getAttribute("disabled") == "true";
+    }, 650, this);
+  },
+
+  _cancelTransition: function () {
+    if (this._timer) {
+      clearTimeout(this._timer);
+      this._timer = 0;
+    }
+  }
+};
+
+var TabsProgressListener = {
+  onStateChange: function (aBrowser, aWebProgress, aRequest, aStateFlags, aStatus) {
+    // Collect telemetry data about tab load times.
+    if (aWebProgress.isTopLevel) {
+      if (aStateFlags & Ci.nsIWebProgressListener.STATE_IS_WINDOW) {
+        if (aStateFlags & Ci.nsIWebProgressListener.STATE_START) {
+          TelemetryStopwatch.start("FX_PAGE_LOAD_MS", aBrowser);
+          Services.telemetry.getHistogramById("FX_TOTAL_TOP_VISITS").add(true);
+        } else if (aStateFlags & Ci.nsIWebProgressListener.STATE_STOP) {
+          TelemetryStopwatch.finish("FX_PAGE_LOAD_MS", aBrowser);
+        }
+      } else if (aStateFlags & Ci.nsIWebProgressListener.STATE_STOP &&
+                 aStatus == Cr.NS_BINDING_ABORTED) {
+        TelemetryStopwatch.cancel("FX_PAGE_LOAD_MS", aBrowser);
+      }
+    }
+
+    // Attach a listener to watch for "click" events bubbling up from error
+    // pages and other similar pages (like about:newtab). This lets us fix bugs
+    // like 401575 which require error page UI to do privileged things, without
+    // letting error pages have any privilege themselves.
+    // We can't look for this during onLocationChange since at that point the
+    // document URI is not yet the about:-uri of the error page.
+
+    let isRemoteBrowser = aBrowser.isRemoteBrowser;
+    // We check isRemoteBrowser here to avoid requesting the doc CPOW
+    let doc = isRemoteBrowser ? null : aWebProgress.DOMWindow.document;
+
+    if (!isRemoteBrowser &&
+        aStateFlags & Ci.nsIWebProgressListener.STATE_STOP &&
+        Components.isSuccessCode(aStatus) &&
+        doc.documentURI.startsWith("about:") &&
+        !doc.documentURI.toLowerCase().startsWith("about:blank") &&
+        !doc.documentURI.toLowerCase().startsWith("about:home") &&
+        !doc.documentElement.hasAttribute("hasBrowserHandlers")) {
+      // STATE_STOP may be received twice for documents, thus store an
+      // attribute to ensure handling it just once.
+      doc.documentElement.setAttribute("hasBrowserHandlers", "true");
+      aBrowser.addEventListener("click", BrowserOnClick, true);
+      aBrowser.addEventListener("pagehide", function onPageHide(event) {
+        if (event.target.defaultView.frameElement)
+          return;
+        aBrowser.removeEventListener("click", BrowserOnClick, true);
+        aBrowser.removeEventListener("pagehide", onPageHide, true);
+        if (event.target.documentElement)
+          event.target.documentElement.removeAttribute("hasBrowserHandlers");
+      }, true);
+
+#ifdef MOZ_CRASHREPORTER
+      if (doc.documentURI.startsWith("about:tabcrashed"))
+        TabCrashReporter.onAboutTabCrashedLoad(aBrowser);
+#endif
+    }
+  },
+
+  onLocationChange: function (aBrowser, aWebProgress, aRequest, aLocationURI,
+                              aFlags) {
+    // Filter out location changes caused by anchor navigation
+    // or history.push/pop/replaceState.
+    if (aFlags & Ci.nsIWebProgressListener.LOCATION_CHANGE_SAME_DOCUMENT)
+      return;
+
+    // Filter out location changes in sub documents.
+    if (!aWebProgress.isTopLevel)
+      return;
+
+    // Only need to call locationChange if the PopupNotifications object
+    // for this window has already been initialized (i.e. its getter no
+    // longer exists)
+    if (!Object.getOwnPropertyDescriptor(window, "PopupNotifications").get)
+      PopupNotifications.locationChange(aBrowser);
+
+    gBrowser.getNotificationBox(aBrowser).removeTransientNotifications();
+
+    FullZoom.onLocationChange(aLocationURI, false, aBrowser);
+  },
+
+  onRefreshAttempted: function (aBrowser, aWebProgress, aURI, aDelay, aSameURI) {
+    if (gPrefService.getBoolPref("accessibility.blockautorefresh")) {
+      let brandBundle = document.getElementById("bundle_brand");
+      let brandShortName = brandBundle.getString("brandShortName");
+      let refreshButtonText =
+        gNavigatorBundle.getString("refreshBlocked.goButton");
+      let refreshButtonAccesskey =
+        gNavigatorBundle.getString("refreshBlocked.goButton.accesskey");
+      let message =
+        gNavigatorBundle.getFormattedString(aSameURI ? "refreshBlocked.refreshLabel"
+                                                     : "refreshBlocked.redirectLabel",
+                                            [brandShortName]);
+      let docShell = aWebProgress.DOMWindow
+                                 .QueryInterface(Ci.nsIInterfaceRequestor)
+                                 .getInterface(Ci.nsIWebNavigation)
+                                 .QueryInterface(Ci.nsIDocShell);
+      let notificationBox = gBrowser.getNotificationBox(aBrowser);
+      let notification = notificationBox.getNotificationWithValue("refresh-blocked");
+      if (notification) {
+        notification.label = message;
+        notification.refreshURI = aURI;
+        notification.delay = aDelay;
+        notification.docShell = docShell;
+      } else {
+        let buttons = [{
+          label: refreshButtonText,
+          accessKey: refreshButtonAccesskey,
+          callback: function (aNotification, aButton) {
+            var refreshURI = aNotification.docShell
+                                          .QueryInterface(Ci.nsIRefreshURI);
+            refreshURI.forceRefreshURI(aNotification.refreshURI,
+                                       aNotification.delay, true);
+          }
+        }];
+        notification =
+          notificationBox.appendNotification(message, "refresh-blocked",
+                                             "chrome://browser/skin/Info.png",
+                                             notificationBox.PRIORITY_INFO_MEDIUM,
+                                             buttons);
+        notification.refreshURI = aURI;
+        notification.delay = aDelay;
+        notification.docShell = docShell;
+      }
+      return false;
+    }
+    return true;
+  }
+}
+
+function nsBrowserAccess() { }
+
+nsBrowserAccess.prototype = {
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIBrowserDOMWindow, Ci.nsISupports]),
+
+  _openURIInNewTab: function(aURI, aOpener, aIsExternal) {
+    let win, needToFocusWin;
+
+    // try the current window.  if we're in a popup, fall back on the most recent browser window
+    if (window.toolbar.visible)
+      win = window;
+    else {
+      let isPrivate = PrivateBrowsingUtils.isWindowPrivate(aOpener || window);
+      win = RecentWindow.getMostRecentBrowserWindow({private: isPrivate});
+      needToFocusWin = true;
+    }
+
+    if (!win) {
+      // we couldn't find a suitable window, a new one needs to be opened.
+      return null;
+    }
+
+    if (aIsExternal && (!aURI || aURI.spec == "about:blank")) {
+      win.BrowserOpenTab(); // this also focuses the location bar
+      win.focus();
+      return win.gBrowser.selectedBrowser;
+    }
+
+    let loadInBackground = gPrefService.getBoolPref("browser.tabs.loadDivertedInBackground");
+    let referrer = aOpener ? makeURI(aOpener.location.href) : null;
+
+    let tab = win.gBrowser.loadOneTab(aURI ? aURI.spec : "about:blank", {
+                                      referrerURI: referrer,
+                                      fromExternal: aIsExternal,
+                                      inBackground: loadInBackground});
+    let browser = win.gBrowser.getBrowserForTab(tab);
+
+    if (needToFocusWin || (!loadInBackground && aIsExternal))
+      win.focus();
+
+    return browser;
+  },
+
+  openURI: function (aURI, aOpener, aWhere, aContext) {
+    var newWindow = null;
+    var isExternal = (aContext == Ci.nsIBrowserDOMWindow.OPEN_EXTERNAL);
+
+    if (isExternal && aURI && aURI.schemeIs("chrome")) {
+      dump("use -chrome command-line option to load external chrome urls\n");
+      return null;
+    }
+
+    if (aWhere == Ci.nsIBrowserDOMWindow.OPEN_DEFAULTWINDOW) {
+      if (isExternal &&
+          gPrefService.prefHasUserValue("browser.link.open_newwindow.override.external"))
+        aWhere = gPrefService.getIntPref("browser.link.open_newwindow.override.external");
+      else
+        aWhere = gPrefService.getIntPref("browser.link.open_newwindow");
+    }
+    switch (aWhere) {
+      case Ci.nsIBrowserDOMWindow.OPEN_NEWWINDOW :
+        // FIXME: Bug 408379. So how come this doesn't send the
+        // referrer like the other loads do?
+        var url = aURI ? aURI.spec : "about:blank";
+        // Pass all params to openDialog to ensure that "url" isn't passed through
+        // loadOneOrMoreURIs, which splits based on "|"
+        newWindow = openDialog(getBrowserURL(), "_blank", "all,dialog=no", url, null, null, null);
+        break;
+      case Ci.nsIBrowserDOMWindow.OPEN_NEWTAB :
+        let browser = this._openURIInNewTab(aURI, aOpener, isExternal);
+        if (browser)
+          newWindow = browser.contentWindow;
+        break;
+      default : // OPEN_CURRENTWINDOW or an illegal value
+        newWindow = content;
+        if (aURI) {
+          let referrer = aOpener ? makeURI(aOpener.location.href) : null;
+          let loadflags = isExternal ?
+                            Ci.nsIWebNavigation.LOAD_FLAGS_FROM_EXTERNAL :
+                            Ci.nsIWebNavigation.LOAD_FLAGS_NONE;
+          gBrowser.loadURIWithFlags(aURI.spec, loadflags, referrer, null, null);
+        }
+        if (!gPrefService.getBoolPref("browser.tabs.loadDivertedInBackground"))
+          window.focus();
+    }
+    return newWindow;
+  },
+
+  openURIInFrame: function browser_openURIInFrame(aURI, aOpener, aWhere, aContext) {
+    if (aWhere != Ci.nsIBrowserDOMWindow.OPEN_NEWTAB) {
+      dump("Error: openURIInFrame can only open in new tabs");
+      return null;
+    }
+
+    var isExternal = (aContext == Ci.nsIBrowserDOMWindow.OPEN_EXTERNAL);
+    let browser = this._openURIInNewTab(aURI, aOpener, isExternal);
+    if (browser)
+      return browser.QueryInterface(Ci.nsIFrameLoaderOwner);
+
+    return null;
+  },
+
+  isTabContentWindow: function (aWindow) {
+    return gBrowser.browsers.some(function (browser) browser.contentWindow == aWindow);
+  },
+
+  get contentWindow() {
+    return gBrowser.contentWindow;
+  }
+}
+
+function getTogglableToolbars() {
+  let toolbarNodes = Array.slice(gNavToolbox.childNodes);
+  toolbarNodes = toolbarNodes.concat(gNavToolbox.externalToolbars);
+  toolbarNodes = toolbarNodes.filter(node => node.getAttribute("toolbarname"));
+  return toolbarNodes;
+}
+
+function onViewToolbarsPopupShowing(aEvent, aInsertPoint) {
+  var popup = aEvent.target;
+  if (popup != aEvent.currentTarget)
+    return;
+
+  // Empty the menu
+  for (var i = popup.childNodes.length-1; i >= 0; --i) {
+    var deadItem = popup.childNodes[i];
+    if (deadItem.hasAttribute("toolbarId"))
+      popup.removeChild(deadItem);
+  }
+
+  var firstMenuItem = aInsertPoint || popup.firstChild;
+
+  let toolbarNodes = getTogglableToolbars();
+
+  for (let toolbar of toolbarNodes) {
+    let menuItem = document.createElement("menuitem");
+    let hidingAttribute = toolbar.getAttribute("type") == "menubar" ?
+                          "autohide" : "collapsed";
+    menuItem.setAttribute("id", "toggle_" + toolbar.id);
+    menuItem.setAttribute("toolbarId", toolbar.id);
+    menuItem.setAttribute("type", "checkbox");
+    menuItem.setAttribute("label", toolbar.getAttribute("toolbarname"));
+    menuItem.setAttribute("checked", toolbar.getAttribute(hidingAttribute) != "true");
+    menuItem.setAttribute("accesskey", toolbar.getAttribute("accesskey"));
+    if (popup.id != "toolbar-context-menu")
+      menuItem.setAttribute("key", toolbar.getAttribute("key"));
+
+    popup.insertBefore(menuItem, firstMenuItem);
+
+    menuItem.addEventListener("command", onViewToolbarCommand, false);
+  }
+
+
+  let moveToPanel = popup.querySelector(".customize-context-moveToPanel");
+  let removeFromToolbar = popup.querySelector(".customize-context-removeFromToolbar");
+  // View -> Toolbars menu doesn't have the moveToPanel or removeFromToolbar items.
+  if (!moveToPanel || !removeFromToolbar) {
+    return;
+  }
+
+  // triggerNode can be a nested child element of a toolbaritem.
+  let toolbarItem = popup.triggerNode;
+
+  if (toolbarItem && toolbarItem.localName == "toolbarpaletteitem") {
+    toolbarItem = toolbarItem.firstChild;
+  } else if (toolbarItem && toolbarItem.localName != "toolbar") {
+    while (toolbarItem && toolbarItem.parentNode) {
+      let parent = toolbarItem.parentNode;
+      if ((parent.classList && parent.classList.contains("customization-target")) ||
+          parent.getAttribute("overflowfortoolbar") || // Needs to work in the overflow list as well.
+          parent.localName == "toolbarpaletteitem" ||
+          parent.localName == "toolbar")
+        break;
+      toolbarItem = parent;
+    }
+  } else {
+    toolbarItem = null;
+  }
+
+  // Right-clicking on an empty part of the tabstrip will exit
+  // the above loop with toolbarItem being the xul:document.
+  // That has no parentNode, and we should disable the items in
+  // this case.
+  let movable = toolbarItem && toolbarItem.parentNode &&
+                CustomizableUI.isWidgetRemovable(toolbarItem);
+  if (movable) {
+    moveToPanel.removeAttribute("disabled");
+    removeFromToolbar.removeAttribute("disabled");
+  } else {
+    moveToPanel.setAttribute("disabled", true);
+    removeFromToolbar.setAttribute("disabled", true);
+  }
+}
+
+function onViewToolbarCommand(aEvent) {
+  var toolbarId = aEvent.originalTarget.getAttribute("toolbarId");
+  var isVisible = aEvent.originalTarget.getAttribute("checked") == "true";
+  CustomizableUI.setToolbarVisibility(toolbarId, isVisible);
+}
+
+function setToolbarVisibility(toolbar, isVisible, persist=true) {
+  let hidingAttribute;
+  if (toolbar.getAttribute("type") == "menubar") {
+    hidingAttribute = "autohide";
+#ifdef MOZ_WIDGET_GTK
+    Services.prefs.setBoolPref("ui.key.menuAccessKeyFocuses", !isVisible);
+#endif
+  } else {
+    hidingAttribute = "collapsed";
+  }
+
+  toolbar.setAttribute(hidingAttribute, !isVisible);
+  if (persist) {
+    document.persist(toolbar.id, hidingAttribute);
+  }
+
+  let eventParams = {
+    detail: {
+      visible: isVisible
+    },
+    bubbles: true
+  };
+  let event = new CustomEvent("toolbarvisibilitychange", eventParams);
+  toolbar.dispatchEvent(event);
+
+  PlacesToolbarHelper.init();
+  BookmarkingUI.onToolbarVisibilityChange();
+  gBrowser.updateWindowResizers();
+  if (isVisible)
+    ToolbarIconColor.inferFromText();
+}
+
+var TabsInTitlebar = {
+  init: function () {
+#ifdef CAN_DRAW_IN_TITLEBAR
+    this._readPref();
+    Services.prefs.addObserver(this._prefName, this, false);
+
+    // We need to update the appearance of the titlebar when the menu changes
+    // from the active to the inactive state. We can't, however, rely on
+    // DOMMenuBarInactive, because the menu fires this event and then removes
+    // the inactive attribute after an event-loop spin.
+    //
+    // Because updating the appearance involves sampling the heights and margins
+    // of various elements, it's important that the layout be more or less
+    // settled before updating the titlebar. So instead of listening to
+    // DOMMenuBarActive and DOMMenuBarInactive, we use a MutationObserver to
+    // watch the "invalid" attribute directly.
+    let menu = document.getElementById("toolbar-menubar");
+    this._menuObserver = new MutationObserver(this._onMenuMutate);
+    this._menuObserver.observe(menu, {attributes: true});
+
+    this.onAreaReset = function(aArea) {
+      if (aArea == CustomizableUI.AREA_TABSTRIP || aArea == CustomizableUI.AREA_MENUBAR)
+        this._update(true);
+    };
+    this.onWidgetAdded = this.onWidgetRemoved = function(aWidgetId, aArea) {
+      if (aArea == CustomizableUI.AREA_TABSTRIP || aArea == CustomizableUI.AREA_MENUBAR)
+        this._update(true);
+    };
+    CustomizableUI.addListener(this);
+
+    this._initialized = true;
+#endif
+  },
+
+  allowedBy: function (condition, allow) {
+#ifdef CAN_DRAW_IN_TITLEBAR
+    if (allow) {
+      if (condition in this._disallowed) {
+        delete this._disallowed[condition];
+        this._update(true);
+      }
+    } else {
+      if (!(condition in this._disallowed)) {
+        this._disallowed[condition] = null;
+        this._update(true);
+      }
+    }
+#endif
+  },
+
+  updateAppearance: function updateAppearance(aForce) {
+#ifdef CAN_DRAW_IN_TITLEBAR
+    this._update(aForce);
+#endif
+  },
+
+  get enabled() {
+    return document.documentElement.getAttribute("tabsintitlebar") == "true";
+  },
+
+#ifdef CAN_DRAW_IN_TITLEBAR
+  observe: function (subject, topic, data) {
+    if (topic == "nsPref:changed")
+      this._readPref();
+  },
+
+  _onMenuMutate: function (aMutations) {
+    for (let mutation of aMutations) {
+      if (mutation.attributeName == "inactive" ||
+          mutation.attributeName == "autohide") {
+        TabsInTitlebar._update(true);
+        return;
+      }
+    }
+  },
+
+  _initialized: false,
+  _disallowed: {},
+  _prefName: "browser.tabs.drawInTitlebar",
+  _lastSizeMode: null,
+
+  _readPref: function () {
+    this.allowedBy("pref",
+                   Services.prefs.getBoolPref(this._prefName));
+  },
+
+  _update: function (aForce=false) {
+    function $(id) document.getElementById(id);
+    function rect(ele) ele.getBoundingClientRect();
+    function verticalMargins(cstyle) parseFloat(cstyle.marginBottom) + parseFloat(cstyle.marginTop);
+
+    if (!this._initialized || window.fullScreen)
+      return;
+
+    let allowed = true;
+
+    if (!aForce) {
+      // _update is called on resize events, because the window is not ready
+      // after sizemode events. However, we only care about the event when the
+      // sizemode is different from the last time we updated the appearance of
+      // the tabs in the titlebar.
+      let sizemode = document.documentElement.getAttribute("sizemode");
+      if (this._lastSizeMode == sizemode) {
+        return;
+      }
+      this._lastSizeMode = sizemode;
+    }
+
+    for (let something in this._disallowed) {
+      allowed = false;
+      break;
+    }
+
+    let titlebar = $("titlebar");
+    let titlebarContent = $("titlebar-content");
+    let menubar = $("toolbar-menubar");
+
+    if (allowed) {
+      // We set the tabsintitlebar attribute first so that our CSS for
+      // tabsintitlebar manifests before we do our measurements.
+      document.documentElement.setAttribute("tabsintitlebar", "true");
+      updateTitlebarDisplay();
+
+      // Try to avoid reflows in this code by calculating dimensions first and
+      // then later set the properties affecting layout together in a batch.
+
+      // Get the full height of the tabs toolbar:
+      let tabsToolbar = $("TabsToolbar");
+      let fullTabsHeight = rect(tabsToolbar).height;
+      // Buttons first:
+      let captionButtonsBoxWidth = rect($("titlebar-buttonbox-container")).width;
+
+#ifdef XP_MACOSX
+      let secondaryButtonsWidth = rect($("titlebar-secondary-buttonbox")).width;
+      // No need to look up the menubar stuff on OS X:
+      let menuHeight = 0;
+      let fullMenuHeight = 0;
+      // Instead, look up the titlebar padding:
+      let titlebarPadding = parseInt(window.getComputedStyle(titlebar).paddingTop, 10);
+#else
+      // Otherwise, get the height and margins separately for the menubar
+      let menuHeight = rect(menubar).height;
+      let menuStyles = window.getComputedStyle(menubar);
+      let fullMenuHeight = verticalMargins(menuStyles) + menuHeight;
+      let tabsStyles = window.getComputedStyle(tabsToolbar);
+      fullTabsHeight += verticalMargins(tabsStyles);
+#endif
+
+      // If the navbar overlaps the tabbar using negative margins, we need to take those into
+      // account so we don't overlap it
+      let navbarMarginTop = parseFloat(window.getComputedStyle($("nav-bar")).marginTop);
+      navbarMarginTop = Math.min(navbarMarginTop, 0);
+
+      // And get the height of what's in the titlebar:
+      let titlebarContentHeight = rect(titlebarContent).height;
+
+      // Begin setting CSS properties which will cause a reflow
+
+      // If the menubar is around (menuHeight is non-zero), try to adjust
+      // its full height (i.e. including margins) to match the titlebar,
+      // by changing the menubar's bottom padding
+      if (menuHeight) {
+        // Calculate the difference between the titlebar's height and that of the menubar
+        let menuTitlebarDelta = titlebarContentHeight - fullMenuHeight;
+        let paddingBottom;
+        // The titlebar is bigger:
+        if (menuTitlebarDelta > 0) {
+          fullMenuHeight += menuTitlebarDelta;
+          // If there is already padding on the menubar, we need to add that
+          // to the difference so the total padding is correct:
+          if ((paddingBottom = menuStyles.paddingBottom)) {
+            menuTitlebarDelta += parseFloat(paddingBottom);
+          }
+          menubar.style.paddingBottom = menuTitlebarDelta + "px";
+        // The menubar is bigger, but has bottom padding we can remove:
+        } else if (menuTitlebarDelta < 0 && (paddingBottom = menuStyles.paddingBottom)) {
+          let existingPadding = parseFloat(paddingBottom);
+          // menuTitlebarDelta is negative; work out what's left, but don't set negative padding:
+          let desiredPadding = Math.max(0, existingPadding + menuTitlebarDelta);
+          menubar.style.paddingBottom = desiredPadding + "px";
+          // We've changed the menu height now:
+          fullMenuHeight += desiredPadding - existingPadding;
+        }
+      }
+
+      // Next, we calculate how much we need to stretch the titlebar down to
+      // go all the way to the bottom of the tab strip, if necessary.
+      let tabAndMenuHeight = fullTabsHeight + fullMenuHeight;
+
+      if (tabAndMenuHeight > titlebarContentHeight) {
+        // We need to increase the titlebar content's outer height (ie including margins)
+        // to match the tab and menu height:
+        let extraMargin = tabAndMenuHeight - titlebarContentHeight;
+        // We need to reduce the height by the amount of navbar overlap
+        // (this value is 0 or negative):
+        extraMargin += navbarMarginTop;
+        // On non-OSX, we can just use bottom margin:
+#ifndef XP_MACOSX
+        titlebarContent.style.marginBottom = extraMargin + "px";
+#endif
+        titlebarContentHeight += extraMargin;
+      }
+
+      // Then we bring up the titlebar by the same amount, but we add any negative margin:
+      titlebar.style.marginBottom = "-" + titlebarContentHeight + "px";
+
+
+      // Finally, size the placeholders:
+#ifdef XP_MACOSX
+      this._sizePlaceholder("fullscreen-button", secondaryButtonsWidth);
+#endif
+      this._sizePlaceholder("caption-buttons", captionButtonsBoxWidth);
+
+      if (!this._draghandles) {
+        this._draghandles = {};
+        let tmp = {};
+        Components.utils.import("resource://gre/modules/WindowDraggingUtils.jsm", tmp);
+
+        let mouseDownCheck = function () {
+          return !this._dragBindingAlive && TabsInTitlebar.enabled;
+        };
+
+        this._draghandles.tabsToolbar = new tmp.WindowDraggingElement(tabsToolbar);
+        this._draghandles.tabsToolbar.mouseDownCheck = mouseDownCheck;
+
+        this._draghandles.navToolbox = new tmp.WindowDraggingElement(gNavToolbox);
+        this._draghandles.navToolbox.mouseDownCheck = mouseDownCheck;
+      }
+    } else {
+      document.documentElement.removeAttribute("tabsintitlebar");
+      updateTitlebarDisplay();
+
+#ifdef XP_MACOSX
+      let secondaryButtonsWidth = rect($("titlebar-secondary-buttonbox")).width;
+      this._sizePlaceholder("fullscreen-button", secondaryButtonsWidth);
+#endif
+      // Reset the margins and padding that might have been modified:
+      titlebarContent.style.marginTop = "";
+      titlebarContent.style.marginBottom = "";
+      titlebar.style.marginBottom = "";
+      menubar.style.paddingBottom = "";
+    }
+
+    ToolbarIconColor.inferFromText();
+  },
+
+  _sizePlaceholder: function (type, width) {
+    Array.forEach(document.querySelectorAll(".titlebar-placeholder[type='"+ type +"']"),
+                  function (node) { node.width = width; });
+  },
+#endif
+
+  uninit: function () {
+#ifdef CAN_DRAW_IN_TITLEBAR
+    this._initialized = false;
+    Services.prefs.removeObserver(this._prefName, this);
+    this._menuObserver.disconnect();
+    CustomizableUI.removeListener(this);
+#endif
+  }
+};
+
+#ifdef CAN_DRAW_IN_TITLEBAR
+function updateTitlebarDisplay() {
+
+#ifdef XP_MACOSX
+  // OS X and the other platforms differ enough to necessitate this kind of
+  // special-casing. Like the other platforms where we CAN_DRAW_IN_TITLEBAR,
+  // we draw in the OS X titlebar when putting the tabs up there. However, OS X
+  // also draws in the titlebar when a lightweight theme is applied, regardless
+  // of whether or not the tabs are drawn in the titlebar.
+  if (TabsInTitlebar.enabled) {
+    document.documentElement.setAttribute("chromemargin-nonlwtheme", "0,-1,-1,-1");
+    document.documentElement.setAttribute("chromemargin", "0,-1,-1,-1");
+    document.documentElement.removeAttribute("drawtitle");
+  } else {
+    // We set chromemargin-nonlwtheme to "" instead of removing it as a way of
+    // making sure that LightweightThemeConsumer doesn't take it upon itself to
+    // detect this value again if and when we do a lwtheme state change.
+    document.documentElement.setAttribute("chromemargin-nonlwtheme", "");
+    let isCustomizing = document.documentElement.hasAttribute("customizing");
+    let hasLWTheme = document.documentElement.hasAttribute("lwtheme");
+    let isPrivate = PrivateBrowsingUtils.isWindowPrivate(window);
+    if ((!hasLWTheme || isCustomizing) && !isPrivate) {
+      document.documentElement.removeAttribute("chromemargin");
+    }
+    document.documentElement.setAttribute("drawtitle", "true");
+  }
+
+#else
+
+  if (TabsInTitlebar.enabled)
+    document.documentElement.setAttribute("chromemargin", "0,2,2,2");
+  else
+    document.documentElement.removeAttribute("chromemargin");
+#endif
+}
+#endif
+
+#ifdef CAN_DRAW_IN_TITLEBAR
+function onTitlebarMaxClick() {
+  if (window.windowState == window.STATE_MAXIMIZED)
+    window.restore();
+  else
+    window.maximize();
+}
+#endif
+
+function displaySecurityInfo()
+{
+  BrowserPageInfo(null, "securityTab");
+}
+
+/**
+ * Opens or closes the sidebar identified by commandID.
+ *
+ * @param commandID a string identifying the sidebar to toggle; see the
+ *                  note below. (Optional if a sidebar is already open.)
+ * @param forceOpen boolean indicating whether the sidebar should be
+ *                  opened regardless of its current state (optional).
+ * @note
+ * We expect to find a xul:broadcaster element with the specified ID.
+ * The following attributes on that element may be used and/or modified:
+ *  - id           (required) the string to match commandID. The convention
+ *                 is to use this naming scheme: 'view<sidebar-name>Sidebar'.
+ *  - sidebarurl   (required) specifies the URL to load in this sidebar.
+ *  - sidebartitle or label (in that order) specify the title to
+ *                 display on the sidebar.
+ *  - checked      indicates whether the sidebar is currently displayed.
+ *                 Note that toggleSidebar updates this attribute when
+ *                 it changes the sidebar's visibility.
+ *  - group        this attribute must be set to "sidebar".
+ */
+function toggleSidebar(commandID, forceOpen) {
+
+  var sidebarBox = document.getElementById("sidebar-box");
+  if (!commandID)
+    commandID = sidebarBox.getAttribute("sidebarcommand");
+
+  var sidebarBroadcaster = document.getElementById(commandID);
+  var sidebar = document.getElementById("sidebar"); // xul:browser
+  var sidebarTitle = document.getElementById("sidebar-title");
+  var sidebarSplitter = document.getElementById("sidebar-splitter");
+
+  if (sidebarBroadcaster.getAttribute("checked") == "true") {
+    if (!forceOpen) {
+      // Replace the document currently displayed in the sidebar with about:blank
+      // so that we can free memory by unloading the page. We need to explicitly
+      // create a new content viewer because the old one doesn't get destroyed
+      // until about:blank has loaded (which does not happen as long as the
+      // element is hidden).
+      sidebar.setAttribute("src", "about:blank");
+      sidebar.docShell.createAboutBlankContentViewer(null);
+
+      sidebarBroadcaster.removeAttribute("checked");
+      sidebarBox.setAttribute("sidebarcommand", "");
+      sidebarTitle.value = "";
+      sidebarBox.hidden = true;
+      sidebarSplitter.hidden = true;
+      gBrowser.selectedBrowser.focus();
+    } else {
+      fireSidebarFocusedEvent();
+    }
+    return;
+  }
+
+  // now we need to show the specified sidebar
+
+  // ..but first update the 'checked' state of all sidebar broadcasters
+  var broadcasters = document.getElementsByAttribute("group", "sidebar");
+  for (let broadcaster of broadcasters) {
+    // skip elements that observe sidebar broadcasters and random
+    // other elements
+    if (broadcaster.localName != "broadcaster")
+      continue;
+
+    if (broadcaster != sidebarBroadcaster)
+      broadcaster.removeAttribute("checked");
+    else
+      sidebarBroadcaster.setAttribute("checked", "true");
+  }
+
+  sidebarBox.hidden = false;
+  sidebarSplitter.hidden = false;
+
+  var url = sidebarBroadcaster.getAttribute("sidebarurl");
+  var title = sidebarBroadcaster.getAttribute("sidebartitle");
+  if (!title)
+    title = sidebarBroadcaster.getAttribute("label");
+  sidebar.setAttribute("src", url); // kick off async load
+  sidebarBox.setAttribute("sidebarcommand", sidebarBroadcaster.id);
+  sidebarTitle.value = title;
+
+  // We set this attribute here in addition to setting it on the <browser>
+  // element itself, because the code in gBrowserInit.onUnload persists this
+  // attribute, not the "src" of the <browser id="sidebar">. The reason it
+  // does that is that we want to delay sidebar load a bit when a browser
+  // window opens. See delayedStartup().
+  sidebarBox.setAttribute("src", url);
+
+  if (sidebar.contentDocument.location.href != url)
+    sidebar.addEventListener("load", sidebarOnLoad, true);
+  else // older code handled this case, so we do it too
+    fireSidebarFocusedEvent();
+}
+
+function sidebarOnLoad(event) {
+  var sidebar = document.getElementById("sidebar");
+  sidebar.removeEventListener("load", sidebarOnLoad, true);
+  // We're handling the 'load' event before it bubbles up to the usual
+  // (non-capturing) event handlers. Let it bubble up before firing the
+  // SidebarFocused event.
+  setTimeout(fireSidebarFocusedEvent, 0);
+}
+
+/**
+ * Fire a "SidebarFocused" event on the sidebar's |window| to give the sidebar
+ * a chance to adjust focus as needed. An additional event is needed, because
+ * we don't want to focus the sidebar when it's opened on startup or in a new
+ * window, only when the user opens the sidebar.
+ */
+function fireSidebarFocusedEvent() {
+  var sidebar = document.getElementById("sidebar");
+  var event = document.createEvent("Events");
+  event.initEvent("SidebarFocused", true, false);
+  sidebar.contentWindow.dispatchEvent(event);
+}
+
+
+var gHomeButton = {
+  prefDomain: "browser.startup.homepage",
+  observe: function (aSubject, aTopic, aPrefName)
+  {
+    if (aTopic != "nsPref:changed" || aPrefName != this.prefDomain)
+      return;
+
+    this.updateTooltip();
+  },
+
+  updateTooltip: function (homeButton)
+  {
+    if (!homeButton)
+      homeButton = document.getElementById("home-button");
+    if (homeButton) {
+      var homePage = this.getHomePage();
+      homePage = homePage.replace(/\|/g,', ');
+      if (homePage.toLowerCase() == "about:home")
+        homeButton.setAttribute("tooltiptext", homeButton.getAttribute("aboutHomeOverrideTooltip"));
+      else
+        homeButton.setAttribute("tooltiptext", homePage);
+    }
+  },
+
+  getHomePage: function ()
+  {
+    var url;
+    try {
+      url = gPrefService.getComplexValue(this.prefDomain,
+                                Components.interfaces.nsIPrefLocalizedString).data;
+    } catch (e) {
+    }
+
+    // use this if we can't find the pref
+    if (!url) {
+      var configBundle = Services.strings
+                                 .createBundle("chrome://branding/locale/browserconfig.properties");
+      url = configBundle.GetStringFromName(this.prefDomain);
+    }
+
+    return url;
+  },
+
+  updatePersonalToolbarStyle: function (homeButton)
+  {
+    if (!homeButton)
+      homeButton = document.getElementById("home-button");
+    if (homeButton)
+      homeButton.className = homeButton.parentNode.id == "PersonalToolbar"
+                               || homeButton.parentNode.parentNode.id == "PersonalToolbar" ?
+                             homeButton.className.replace("toolbarbutton-1", "bookmark-item") :
+                             homeButton.className.replace("bookmark-item", "toolbarbutton-1");
+  },
+};
+
+const nodeToTooltipMap = {
+  "bookmarks-menu-button": "bookmarksMenuButton.tooltip",
+#ifdef XP_MACOSX
+  "print-button": "printButton.tooltip",
+#endif
+  "new-window-button": "newWindowButton.tooltip",
+  "fullscreen-button": "fullscreenButton.tooltip",
+  "tabview-button": "tabviewButton.tooltip",
+};
+const nodeToShortcutMap = {
+  "bookmarks-menu-button": "manBookmarkKb",
+#ifdef XP_MACOSX
+  "print-button": "printKb",
+#endif
+  "new-window-button": "key_newNavigator",
+  "fullscreen-button": "key_fullScreen",
+  "tabview-button": "key_tabview",
+};
+const gDynamicTooltipCache = new Map();
+function UpdateDynamicShortcutTooltipText(aTooltip) {
+  let nodeId = aTooltip.triggerNode.id;
+  if (!gDynamicTooltipCache.has(nodeId) && nodeId in nodeToTooltipMap) {
+    let strId = nodeToTooltipMap[nodeId];
+    let args = [];
+    if (nodeId in nodeToShortcutMap) {
+      let shortcutId = nodeToShortcutMap[nodeId];
+      let shortcut = document.getElementById(shortcutId);
+      if (shortcut) {
+        args.push(ShortcutUtils.prettifyShortcut(shortcut));
+      }
+    }
+    gDynamicTooltipCache.set(nodeId, gNavigatorBundle.getFormattedString(strId, args));
+  }
+  aTooltip.setAttribute("label", gDynamicTooltipCache.get(nodeId));
+}
+
+/**
+ * Gets the selected text in the active browser. Leading and trailing
+ * whitespace is removed, and consecutive whitespace is replaced by a single
+ * space. A maximum of 150 characters will be returned, regardless of the value
+ * of aCharLen.
+ *
+ * @param aCharLen
+ *        The maximum number of characters to return.
+ */
+function getBrowserSelection(aCharLen) {
+  // selections of more than 150 characters aren't useful
+  const kMaxSelectionLen = 150;
+  const charLen = Math.min(aCharLen || kMaxSelectionLen, kMaxSelectionLen);
+
+  let [element, focusedWindow] = BrowserUtils.getFocusSync(document);
+  var selection = focusedWindow.getSelection().toString();
+  // try getting a selected text in text input.
+  if (!selection) {
+    var isOnTextInput = function isOnTextInput(elem) {
+      // we avoid to return a value if a selection is in password field.
+      // ref. bug 565717
+      return elem instanceof HTMLTextAreaElement ||
+             (elem instanceof HTMLInputElement && elem.mozIsTextField(true));
+    };
+
+    if (isOnTextInput(element)) {
+      selection = element.QueryInterface(Ci.nsIDOMNSEditableElement)
+                         .editor.selection.toString();
+    }
+  }
+
+  if (selection) {
+    if (selection.length > charLen) {
+      // only use the first charLen important chars. see bug 221361
+      var pattern = new RegExp("^(?:\\s*.){0," + charLen + "}");
+      pattern.test(selection);
+      selection = RegExp.lastMatch;
+    }
+
+    selection = selection.trim().replace(/\s+/g, " ");
+
+    if (selection.length > charLen)
+      selection = selection.substr(0, charLen);
+  }
+  return selection;
+}
+
+var gWebPanelURI;
+function openWebPanel(aTitle, aURI)
+{
+    // Ensure that the web panels sidebar is open.
+    toggleSidebar('viewWebPanelsSidebar', true);
+
+    // Set the title of the panel.
+    document.getElementById("sidebar-title").value = aTitle;
+
+    // Tell the Web Panels sidebar to load the bookmark.
+    var sidebar = document.getElementById("sidebar");
+    if (sidebar.docShell && sidebar.contentDocument && sidebar.contentDocument.getElementById('web-panels-browser')) {
+        sidebar.contentWindow.loadWebPanel(aURI);
+        if (gWebPanelURI) {
+            gWebPanelURI = "";
+            sidebar.removeEventListener("load", asyncOpenWebPanel, true);
+        }
+    }
+    else {
+        // The panel is still being constructed.  Attach an onload handler.
+        if (!gWebPanelURI)
+            sidebar.addEventListener("load", asyncOpenWebPanel, true);
+        gWebPanelURI = aURI;
+    }
+}
+
+function asyncOpenWebPanel(event)
+{
+    var sidebar = document.getElementById("sidebar");
+    if (gWebPanelURI && sidebar.contentDocument && sidebar.contentDocument.getElementById('web-panels-browser'))
+        sidebar.contentWindow.loadWebPanel(gWebPanelURI);
+    gWebPanelURI = "";
+    sidebar.removeEventListener("load", asyncOpenWebPanel, true);
+}
+
+/*
+ * - [ Dependencies ] ---------------------------------------------------------
+ *  utilityOverlay.js:
+ *    - gatherTextUnder
+ */
+
+/**
+ * Extracts linkNode and href for the current click target.
+ *
+ * @param event
+ *        The click event.
+ * @return [href, linkNode].
+ *
+ * @note linkNode will be null if the click wasn't on an anchor
+ *       element (or XLink).
+ */
+function hrefAndLinkNodeForClickEvent(event)
+{
+  function isHTMLLink(aNode)
+  {
+    // Be consistent with what nsContextMenu.js does.
+    return ((aNode instanceof HTMLAnchorElement && aNode.href) ||
+            (aNode instanceof HTMLAreaElement && aNode.href) ||
+            aNode instanceof HTMLLinkElement);
+  }
+
+  let node = event.target;
+  while (node && !isHTMLLink(node)) {
+    node = node.parentNode;
+  }
+
+  if (node)
+    return [node.href, node];
+
+  // If there is no linkNode, try simple XLink.
+  let href, baseURI;
+  node = event.target;
+  while (node && !href) {
+    if (node.nodeType == Node.ELEMENT_NODE) {
+      href = node.getAttributeNS("http://www.w3.org/1999/xlink", "href");
+      if (href)
+        baseURI = node.baseURI;
+    }
+    node = node.parentNode;
+  }
+
+  // In case of XLink, we don't return the node we got href from since
+  // callers expect <a>-like elements.
+  return [href ? makeURLAbsolute(baseURI, href) : null, null];
+}
+
+/**
+ * Called whenever the user clicks in the content area.
+ *
+ * @param event
+ *        The click event.
+ * @param isPanelClick
+ *        Whether the event comes from a web panel.
+ * @note default event is prevented if the click is handled.
+ */
+function contentAreaClick(event, isPanelClick)
+{
+  if (!event.isTrusted || event.defaultPrevented || event.button == 2)
+    return;
+
+  let [href, linkNode] = hrefAndLinkNodeForClickEvent(event);
+  if (!href) {
+    // Not a link, handle middle mouse navigation.
+    if (event.button == 1 &&
+        gPrefService.getBoolPref("middlemouse.contentLoadURL") &&
+        !gPrefService.getBoolPref("general.autoScroll")) {
+      middleMousePaste(event);
+      event.preventDefault();
+    }
+    return;
+  }
+
+  // This code only applies if we have a linkNode (i.e. clicks on real anchor
+  // elements, as opposed to XLink).
+  if (linkNode && event.button == 0 &&
+      !event.ctrlKey && !event.shiftKey && !event.altKey && !event.metaKey) {
+    // A Web panel's links should target the main content area.  Do this
+    // if no modifier keys are down and if there's no target or the target
+    // equals _main (the IE convention) or _content (the Mozilla convention).
+    let target = linkNode.target;
+    let mainTarget = !target || target == "_content" || target  == "_main";
+    if (isPanelClick && mainTarget) {
+      // javascript and data links should be executed in the current browser.
+      if (linkNode.getAttribute("onclick") ||
+          href.startsWith("javascript:") ||
+          href.startsWith("data:"))
+        return;
+
+      try {
+        urlSecurityCheck(href, linkNode.ownerDocument.nodePrincipal);
+      }
+      catch(ex) {
+        // Prevent loading unsecure destinations.
+        event.preventDefault();
+        return;
+      }
+
+      loadURI(href, null, null, false);
+      event.preventDefault();
+      return;
+    }
+
+    if (linkNode.getAttribute("rel") == "sidebar") {
+      // This is the Opera convention for a special link that, when clicked,
+      // allows to add a sidebar panel.  The link's title attribute contains
+      // the title that should be used for the sidebar panel.
+      PlacesUIUtils.showBookmarkDialog({ action: "add"
+                                       , type: "bookmark"
+                                       , uri: makeURI(href)
+                                       , title: linkNode.getAttribute("title")
+                                       , loadBookmarkInSidebar: true
+                                       , hiddenRows: [ "description"
+                                                     , "location"
+                                                     , "keyword" ]
+                                       }, window);
+      event.preventDefault();
+      return;
+    }
+  }
+
+  handleLinkClick(event, href, linkNode);
+
+  // Mark the page as a user followed link.  This is done so that history can
+  // distinguish automatic embed visits from user activated ones.  For example
+  // pages loaded in frames are embed visits and lost with the session, while
+  // visits across frames should be preserved.
+  try {
+    if (!PrivateBrowsingUtils.isWindowPrivate(window))
+      PlacesUIUtils.markPageAsFollowedLink(href);
+  } catch (ex) { /* Skip invalid URIs. */ }
+}
+
+/**
+ * Handles clicks on links.
+ *
+ * @return true if the click event was handled, false otherwise.
+ */
+function handleLinkClick(event, href, linkNode) {
+  if (event.button == 2) // right click
+    return false;
+
+  var where = whereToOpenLink(event);
+  if (where == "current")
+    return false;
+
+  var doc = event.target.ownerDocument;
+
+  if (where == "save") {
+    saveURL(href, linkNode ? gatherTextUnder(linkNode) : "", null, true,
+            true, doc.documentURIObject, doc);
+    event.preventDefault();
+    return true;
+  }
+
+  var referrerURI = doc.documentURIObject;
+  // if the mixedContentChannel is present and the referring URI passes
+  // a same origin check with the target URI, we can preserve the users
+  // decision of disabling MCB on a page for it's child tabs.
+  var persistDisableMCBInChildTab = false;
+
+  if (where == "tab" && gBrowser.docShell.mixedContentChannel) {
+    const sm = Services.scriptSecurityManager;
+    try {
+      var targetURI = makeURI(href);
+      sm.checkSameOriginURI(referrerURI, targetURI, false);
+      persistDisableMCBInChildTab = true;
+    }
+    catch (e) { }
+  }
+
+  urlSecurityCheck(href, doc.nodePrincipal);
+  openLinkIn(href, where, { referrerURI: referrerURI,
+                            charset: doc.characterSet,
+                            disableMCB: persistDisableMCBInChildTab});
+  event.preventDefault();
+  return true;
+}
+
+function middleMousePaste(event) {
+  let clipboard = readFromClipboard();
+  if (!clipboard)
+    return;
+
+  // Strip embedded newlines and surrounding whitespace, to match the URL
+  // bar's behavior (stripsurroundingwhitespace)
+  clipboard = clipboard.replace(/\s*\n\s*/g, "");
+
+  // if it's not the current tab, we don't need to do anything because the 
+  // browser doesn't exist.
+  let where = whereToOpenLink(event, true, false);
+  let lastLocationChange;
+  if (where == "current") {
+    lastLocationChange = gBrowser.selectedBrowser.lastLocationChange;
+  }
+
+  getShortcutOrURIAndPostData(clipboard, data => {
+    try {
+      makeURI(data.url);
+    } catch (ex) {
+      // Not a valid URI.
+      return;
+    }
+
+    try {
+      addToUrlbarHistory(data.url);
+    } catch (ex) {
+      // Things may go wrong when adding url to session history,
+      // but don't let that interfere with the loading of the url.
+      Cu.reportError(ex);
+    }
+
+    if (where != "current" ||
+        lastLocationChange == gBrowser.selectedBrowser.lastLocationChange) {
+      openUILink(data.url, event,
+                 { ignoreButton: true,
+                   disallowInheritPrincipal: !data.mayInheritPrincipal });
+    }
+  });
+
+  event.stopPropagation();
+}
+
+function handleDroppedLink(event, url, name)
+{
+  let lastLocationChange = gBrowser.selectedBrowser.lastLocationChange;
+
+  getShortcutOrURIAndPostData(url, data => {
+    if (data.url &&
+        lastLocationChange == gBrowser.selectedBrowser.lastLocationChange)
+      loadURI(data.url, null, data.postData, false);
+  });
+
+  // Keep the event from being handled by the dragDrop listeners
+  // built-in to gecko if they happen to be above us.
+  event.preventDefault();
+};
+
+function BrowserSetForcedCharacterSet(aCharset)
+{
+  if (aCharset) {
+    gBrowser.docShell.gatherCharsetMenuTelemetry();
+    gBrowser.docShell.charset = aCharset;
+    // Save the forced character-set
+    if (!PrivateBrowsingUtils.isWindowPrivate(window))
+      PlacesUtils.setCharsetForURI(getWebNavigation().currentURI, aCharset);
+  }
+  BrowserCharsetReload();
+}
+
+function BrowserCharsetReload()
+{
+  BrowserReloadWithFlags(nsIWebNavigation.LOAD_FLAGS_CHARSET_CHANGE);
+}
+
+function charsetMenuGetElement(parent, charset) {
+  return parent.getElementsByAttribute("charset", charset)[0];
+}
+
+function UpdateCurrentCharset(target) {
+    // extract the charset from DOM
+    var wnd = document.commandDispatcher.focusedWindow;
+    if ((window == wnd) || (wnd == null)) wnd = window.content;
+
+    // Uncheck previous item
+    if (gPrevCharset) {
+        var pref_item = charsetMenuGetElement(target, gPrevCharset);
+        if (pref_item)
+          pref_item.setAttribute('checked', 'false');
+    }
+
+    var menuitem = charsetMenuGetElement(target, CharsetMenu.foldCharset(wnd.document.characterSet));
+    if (menuitem) {
+        menuitem.setAttribute('checked', 'true');
+    }
+}
+
+function charsetLoadListener() {
+  var charset = CharsetMenu.foldCharset(window.content.document.characterSet);
+
+  if (charset.length > 0 && (charset != gLastBrowserCharset)) {
+    gPrevCharset = gLastBrowserCharset;
+    gLastBrowserCharset = charset;
+  }
+}
+
+var gPageStyleMenu = {
+
+  // This maps from a <browser> element (or, more specifically, a
+  // browser's permanentKey) to a CPOW that gives synchronous access
+  // to the list of style sheets in a content window. The use of the
+  // permanentKey is to avoid issues with docshell swapping.
+  _pageStyleSyncHandlers: new WeakMap(),
+
+  init: function() {
+    let mm = window.messageManager;
+    mm.addMessageListener("PageStyle:SetSyncHandler", (msg) => {
+      this._pageStyleSyncHandlers.set(msg.target.permanentKey, msg.objects.syncHandler);
+    });
+  },
+
+  getAllStyleSheets: function () {
+    let handler = this._pageStyleSyncHandlers.get(gBrowser.selectedBrowser.permanentKey);
+    try {
+      return handler.getAllStyleSheets();
+    } catch (ex) {
+      // In case the child died or timed out.
+      return [];
+    }
+  },
+
+  _getStyleSheetInfo: function (browser) {
+    let handler = this._pageStyleSyncHandlers.get(gBrowser.selectedBrowser.permanentKey);
+    try {
+      return handler.getStyleSheetInfo();
+    } catch (ex) {
+      // In case the child died or timed out.
+      return {styleSheets: [], authorStyleDisabled: false, preferredStyleSheetSet: true};
+    }
+  },
+
+  fillPopup: function (menuPopup) {
+    let styleSheetInfo = this._getStyleSheetInfo(gBrowser.selectedBrowser);
+    var noStyle = menuPopup.firstChild;
+    var persistentOnly = noStyle.nextSibling;
+    var sep = persistentOnly.nextSibling;
+    while (sep.nextSibling)
+      menuPopup.removeChild(sep.nextSibling);
+
+    let styleSheets = styleSheetInfo.styleSheets;
+    var currentStyleSheets = {};
+    var styleDisabled = styleSheetInfo.authorStyleDisabled;
+    var haveAltSheets = false;
+    var altStyleSelected = false;
+
+    for (let currentStyleSheet of styleSheets) {
+      if (!currentStyleSheet.disabled)
+        altStyleSelected = true;
+
+      haveAltSheets = true;
+
+      let lastWithSameTitle = null;
+      if (currentStyleSheet.title in currentStyleSheets)
+        lastWithSameTitle = currentStyleSheets[currentStyleSheet.title];
+
+      if (!lastWithSameTitle) {
+        let menuItem = document.createElement("menuitem");
+        menuItem.setAttribute("type", "radio");
+        menuItem.setAttribute("label", currentStyleSheet.title);
+        menuItem.setAttribute("data", currentStyleSheet.title);
+        menuItem.setAttribute("checked", !currentStyleSheet.disabled && !styleDisabled);
+        menuItem.setAttribute("oncommand", "gPageStyleMenu.switchStyleSheet(this.getAttribute('data'));");
+        menuPopup.appendChild(menuItem);
+        currentStyleSheets[currentStyleSheet.title] = menuItem;
+      } else if (currentStyleSheet.disabled) {
+        lastWithSameTitle.removeAttribute("checked");
+      }
+    }
+
+    noStyle.setAttribute("checked", styleDisabled);
+    persistentOnly.setAttribute("checked", !altStyleSelected && !styleDisabled);
+    persistentOnly.hidden = styleSheetInfo.preferredStyleSheetSet ? haveAltSheets : false;
+    sep.hidden = (noStyle.hidden && persistentOnly.hidden) || !haveAltSheets;
+  },
+
+  switchStyleSheet: function (title) {
+    let mm = gBrowser.selectedBrowser.messageManager;
+    mm.sendAsyncMessage("PageStyle:Switch", {title: title});
+  },
+
+  disableStyle: function () {
+    let mm = gBrowser.selectedBrowser.messageManager;
+    mm.sendAsyncMessage("PageStyle:Disable");
+  },
+};
+
+/* Legacy global page-style functions */
+var getAllStyleSheets   = gPageStyleMenu.getAllStyleSheets.bind(gPageStyleMenu);
+var stylesheetFillPopup = gPageStyleMenu.fillPopup.bind(gPageStyleMenu);
+function stylesheetSwitchAll(contentWindow, title) {
+  // We ignore the contentWindow param. Add-ons don't appear to use
+  // it, and it's difficult to support in e10s (where it will be a
+  // CPOW).
+  gPageStyleMenu.switchStyleSheet(title);
+}
+function setStyleDisabled(disabled) {
+  if (disabled)
+    gPageStyleMenu.disableStyle();
+}
+
+
+var LanguageDetectionListener = {
+  init: function() {
+    window.messageManager.addMessageListener("LanguageDetection:Result", msg => {
+      Translation.languageDetected(msg.target, msg.data);
+    });
+  }
+};
+
+
+var BrowserOffline = {
+  _inited: false,
+
+  /////////////////////////////////////////////////////////////////////////////
+  // BrowserOffline Public Methods
+  init: function ()
+  {
+    if (!this._uiElement)
+      this._uiElement = document.getElementById("workOfflineMenuitemState");
+
+    Services.obs.addObserver(this, "network:offline-status-changed", false);
+
+    this._updateOfflineUI(Services.io.offline);
+
+    this._inited = true;
+  },
+
+  uninit: function ()
+  {
+    if (this._inited) {
+      Services.obs.removeObserver(this, "network:offline-status-changed");
+    }
+  },
+
+  toggleOfflineStatus: function ()
+  {
+    var ioService = Services.io;
+
+    // Stop automatic management of the offline status
+    try {
+      ioService.manageOfflineStatus = false;
+    } catch (ex) {
+    }
+
+    if (!ioService.offline && !this._canGoOffline()) {
+      this._updateOfflineUI(false);
+      return;
+    }
+
+    ioService.offline = !ioService.offline;
+  },
+
+  /////////////////////////////////////////////////////////////////////////////
+  // nsIObserver
+  observe: function (aSubject, aTopic, aState)
+  {
+    if (aTopic != "network:offline-status-changed")
+      return;
+
+    this._updateOfflineUI(aState == "offline");
+  },
+
+  /////////////////////////////////////////////////////////////////////////////
+  // BrowserOffline Implementation Methods
+  _canGoOffline: function ()
+  {
+    try {
+      var cancelGoOffline = Cc["@mozilla.org/supports-PRBool;1"].createInstance(Ci.nsISupportsPRBool);
+      Services.obs.notifyObservers(cancelGoOffline, "offline-requested", null);
+
+      // Something aborted the quit process.
+      if (cancelGoOffline.data)
+        return false;
+    }
+    catch (ex) {
+    }
+
+    return true;
+  },
+
+  _uiElement: null,
+  _updateOfflineUI: function (aOffline)
+  {
+    var offlineLocked = gPrefService.prefIsLocked("network.online");
+    if (offlineLocked)
+      this._uiElement.setAttribute("disabled", "true");
+
+    this._uiElement.setAttribute("checked", aOffline);
+  }
+};
+
+var OfflineApps = {
+  /////////////////////////////////////////////////////////////////////////////
+  // OfflineApps Public Methods
+  init: function ()
+  {
+    Services.obs.addObserver(this, "offline-cache-update-completed", false);
+  },
+
+  uninit: function ()
+  {
+    Services.obs.removeObserver(this, "offline-cache-update-completed");
+  },
+
+  handleEvent: function(event) {
+    if (event.type == "MozApplicationManifest") {
+      this.offlineAppRequested(event.originalTarget.defaultView);
+    }
+  },
+
+  /////////////////////////////////////////////////////////////////////////////
+  // OfflineApps Implementation Methods
+
+  // XXX: _getBrowserWindowForContentWindow and _getBrowserForContentWindow
+  // were taken from browser/components/feeds/src/WebContentConverter.
+  _getBrowserWindowForContentWindow: function(aContentWindow) {
+    return aContentWindow.QueryInterface(Ci.nsIInterfaceRequestor)
+                         .getInterface(Ci.nsIWebNavigation)
+                         .QueryInterface(Ci.nsIDocShellTreeItem)
+                         .rootTreeItem
+                         .QueryInterface(Ci.nsIInterfaceRequestor)
+                         .getInterface(Ci.nsIDOMWindow)
+                         .wrappedJSObject;
+  },
+
+  _getBrowserForContentWindow: function(aBrowserWindow, aContentWindow) {
+    // This depends on pseudo APIs of browser.js and tabbrowser.xml
+    aContentWindow = aContentWindow.top;
+    var browsers = aBrowserWindow.gBrowser.browsers;
+    for (let browser of browsers) {
+      if (browser.contentWindow == aContentWindow)
+        return browser;
+    }
+    // handle other browser/iframe elements that may need popupnotifications
+    let browser = aContentWindow
+                          .QueryInterface(Ci.nsIInterfaceRequestor)
+                          .getInterface(Ci.nsIWebNavigation)
+                          .QueryInterface(Ci.nsIDocShell)
+                          .chromeEventHandler;
+    if (browser.getAttribute("popupnotificationanchor"))
+      return browser;
+    return null;
+  },
+
+  _getManifestURI: function(aWindow) {
+    if (!aWindow.document.documentElement)
+      return null;
+
+    var attr = aWindow.document.documentElement.getAttribute("manifest");
+    if (!attr)
+      return null;
+
+    try {
+      var contentURI = makeURI(aWindow.location.href, null, null);
+      return makeURI(attr, aWindow.document.characterSet, contentURI);
+    } catch (e) {
+      return null;
+    }
+  },
+
+  // A cache update isn't tied to a specific window.  Try to find
+  // the best browser in which to warn the user about space usage
+  _getBrowserForCacheUpdate: function(aCacheUpdate) {
+    // Prefer the current browser
+    var uri = this._getManifestURI(content);
+    if (uri && uri.equals(aCacheUpdate.manifestURI)) {
+      return gBrowser.selectedBrowser;
+    }
+
+    var browsers = gBrowser.browsers;
+    for (let browser of browsers) {
+      uri = this._getManifestURI(browser.contentWindow);
+      if (uri && uri.equals(aCacheUpdate.manifestURI)) {
+        return browser;
+      }
+    }
+
+    // is this from a non-tab browser/iframe?
+    browsers = document.querySelectorAll("iframe[popupnotificationanchor] | browser[popupnotificationanchor]");
+    for (let browser of browsers) {
+      uri = this._getManifestURI(browser.contentWindow);
+      if (uri && uri.equals(aCacheUpdate.manifestURI)) {
+        return browser;
+      }
+    }
+
+    return null;
+  },
+
+  _warnUsage: function(aBrowser, aURI) {
+    if (!aBrowser)
+      return;
+
+    let mainAction = {
+      label: gNavigatorBundle.getString("offlineApps.manageUsage"),
+      accessKey: gNavigatorBundle.getString("offlineApps.manageUsageAccessKey"),
+      callback: OfflineApps.manage
+    };
+
+    let warnQuota = gPrefService.getIntPref("offline-apps.quota.warn");
+    let message = gNavigatorBundle.getFormattedString("offlineApps.usage",
+                                                      [ aURI.host,
+                                                        warnQuota / 1024 ]);
+
+    let anchorID = "indexedDB-notification-icon";
+    PopupNotifications.show(aBrowser, "offline-app-usage", message,
+                            anchorID, mainAction);
+
+    // Now that we've warned once, prevent the warning from showing up
+    // again.
+    Services.perms.add(aURI, "offline-app",
+                       Ci.nsIOfflineCacheUpdateService.ALLOW_NO_WARN);
+  },
+
+  // XXX: duplicated in preferences/advanced.js
+  _getOfflineAppUsage: function (host, groups)
+  {
+    var cacheService = Cc["@mozilla.org/network/application-cache-service;1"].
+                       getService(Ci.nsIApplicationCacheService);
+    if (!groups)
+      groups = cacheService.getGroups();
+
+    var usage = 0;
+    for (let group of groups) {
+      var uri = Services.io.newURI(group, null, null);
+      if (uri.asciiHost == host) {
+        var cache = cacheService.getActiveCache(group);
+        usage += cache.usage;
+      }
+    }
+
+    return usage;
+  },
+
+  _checkUsage: function(aURI) {
+    // if the user has already allowed excessive usage, don't bother checking
+    if (Services.perms.testExactPermission(aURI, "offline-app") !=
+        Ci.nsIOfflineCacheUpdateService.ALLOW_NO_WARN) {
+      var usage = this._getOfflineAppUsage(aURI.asciiHost);
+      var warnQuota = gPrefService.getIntPref("offline-apps.quota.warn");
+      if (usage >= warnQuota * 1024) {
+        return true;
+      }
+    }
+
+    return false;
+  },
+
+  offlineAppRequested: function(aContentWindow) {
+    if (!gPrefService.getBoolPref("browser.offline-apps.notify")) {
+      return;
+    }
+
+    let browserWindow = this._getBrowserWindowForContentWindow(aContentWindow);
+    let browser = this._getBrowserForContentWindow(browserWindow,
+                                                   aContentWindow);
+
+    let currentURI = aContentWindow.document.documentURIObject;
+
+    // don't bother showing UI if the user has already made a decision
+    if (Services.perms.testExactPermission(currentURI, "offline-app") != Services.perms.UNKNOWN_ACTION)
+      return;
+
+    try {
+      if (gPrefService.getBoolPref("offline-apps.allow_by_default")) {
+        // all pages can use offline capabilities, no need to ask the user
+        return;
+      }
+    } catch(e) {
+      // this pref isn't set by default, ignore failures
+    }
+
+    let host = currentURI.asciiHost;
+    let notificationID = "offline-app-requested-" + host;
+    let notification = PopupNotifications.getNotification(notificationID, browser);
+
+    if (notification) {
+      notification.options.documents.push(aContentWindow.document);
+    } else {
+      let mainAction = {
+        label: gNavigatorBundle.getString("offlineApps.allow"),
+        accessKey: gNavigatorBundle.getString("offlineApps.allowAccessKey"),
+        callback: function() {
+          for (let document of notification.options.documents) {
+            OfflineApps.allowSite(document);
+          }
+        }
+      };
+      let secondaryActions = [{
+        label: gNavigatorBundle.getString("offlineApps.never"),
+        accessKey: gNavigatorBundle.getString("offlineApps.neverAccessKey"),
+        callback: function() {
+          for (let document of notification.options.documents) {
+            OfflineApps.disallowSite(document);
+          }
+        }
+      }];
+      let message = gNavigatorBundle.getFormattedString("offlineApps.available",
+                                                        [ host ]);
+      let anchorID = "indexedDB-notification-icon";
+      let options= {
+        documents : [ aContentWindow.document ]
+      };
+      notification = PopupNotifications.show(browser, notificationID, message,
+                                             anchorID, mainAction,
+                                             secondaryActions, options);
+    }
+  },
+
+  allowSite: function(aDocument) {
+    Services.perms.add(aDocument.documentURIObject, "offline-app", Services.perms.ALLOW_ACTION);
+
+    // When a site is enabled while loading, manifest resources will
+    // start fetching immediately.  This one time we need to do it
+    // ourselves.
+    this._startFetching(aDocument);
+  },
+
+  disallowSite: function(aDocument) {
+    Services.perms.add(aDocument.documentURIObject, "offline-app", Services.perms.DENY_ACTION);
+  },
+
+  manage: function() {
+    openAdvancedPreferences("networkTab");
+  },
+
+  _startFetching: function(aDocument) {
+    if (!aDocument.documentElement)
+      return;
+
+    var manifest = aDocument.documentElement.getAttribute("manifest");
+    if (!manifest)
+      return;
+
+    var manifestURI = makeURI(manifest, aDocument.characterSet,
+                              aDocument.documentURIObject);
+
+    var updateService = Cc["@mozilla.org/offlinecacheupdate-service;1"].
+                        getService(Ci.nsIOfflineCacheUpdateService);
+    updateService.scheduleUpdate(manifestURI, aDocument.documentURIObject, window);
+  },
+
+  /////////////////////////////////////////////////////////////////////////////
+  // nsIObserver
+  observe: function (aSubject, aTopic, aState)
+  {
+    if (aTopic == "offline-cache-update-completed") {
+      var cacheUpdate = aSubject.QueryInterface(Ci.nsIOfflineCacheUpdate);
+
+      var uri = cacheUpdate.manifestURI;
+      if (OfflineApps._checkUsage(uri)) {
+        var browser = this._getBrowserForCacheUpdate(cacheUpdate);
+        if (browser) {
+          OfflineApps._warnUsage(browser, cacheUpdate.manifestURI);
+        }
+      }
+    }
+  }
+};
+
+var IndexedDBPromptHelper = {
+  _permissionsPrompt: "indexedDB-permissions-prompt",
+  _permissionsResponse: "indexedDB-permissions-response",
+
+  _quotaPrompt: "indexedDB-quota-prompt",
+  _quotaResponse: "indexedDB-quota-response",
+  _quotaCancel: "indexedDB-quota-cancel",
+
+  _notificationIcon: "indexedDB-notification-icon",
+
+  init:
+  function IndexedDBPromptHelper_init() {
+    Services.obs.addObserver(this, this._permissionsPrompt, false);
+    Services.obs.addObserver(this, this._quotaPrompt, false);
+    Services.obs.addObserver(this, this._quotaCancel, false);
+  },
+
+  uninit:
+  function IndexedDBPromptHelper_uninit() {
+    Services.obs.removeObserver(this, this._permissionsPrompt);
+    Services.obs.removeObserver(this, this._quotaPrompt);
+    Services.obs.removeObserver(this, this._quotaCancel);
+  },
+
+  observe:
+  function IndexedDBPromptHelper_observe(subject, topic, data) {
+    if (topic != this._permissionsPrompt &&
+        topic != this._quotaPrompt &&
+        topic != this._quotaCancel) {
+      throw new Error("Unexpected topic!");
+    }
+
+    var requestor = subject.QueryInterface(Ci.nsIInterfaceRequestor);
+
+    var contentWindow = requestor.getInterface(Ci.nsIDOMWindow);
+    var contentDocument = contentWindow.document;
+    var browserWindow =
+      OfflineApps._getBrowserWindowForContentWindow(contentWindow);
+
+    if (browserWindow != window) {
+      // Must belong to some other window.
+      return;
+    }
+
+    var browser =
+      OfflineApps._getBrowserForContentWindow(browserWindow, contentWindow);
+
+    var host = contentDocument.documentURIObject.asciiHost;
+
+    var message;
+    var responseTopic;
+    if (topic == this._permissionsPrompt) {
+      message = gNavigatorBundle.getFormattedString("offlineApps.available",
+                                                    [ host ]);
+      responseTopic = this._permissionsResponse;
+    }
+    else if (topic == this._quotaPrompt) {
+      message = gNavigatorBundle.getFormattedString("indexedDB.usage",
+                                                    [ host, data ]);
+      responseTopic = this._quotaResponse;
+    }
+    else if (topic == this._quotaCancel) {
+      responseTopic = this._quotaResponse;
+    }
+
+    const hiddenTimeoutDuration = 30000; // 30 seconds
+    const firstTimeoutDuration = 300000; // 5 minutes
+
+    var timeoutId;
+
+    var observer = requestor.getInterface(Ci.nsIObserver);
+
+    var mainAction = {
+      label: gNavigatorBundle.getString("offlineApps.allow"),
+      accessKey: gNavigatorBundle.getString("offlineApps.allowAccessKey"),
+      callback: function() {
+        clearTimeout(timeoutId);
+        observer.observe(null, responseTopic,
+                         Ci.nsIPermissionManager.ALLOW_ACTION);
+      }
+    };
+
+    var secondaryActions = [
+      {
+        label: gNavigatorBundle.getString("offlineApps.never"),
+        accessKey: gNavigatorBundle.getString("offlineApps.neverAccessKey"),
+        callback: function() {
+          clearTimeout(timeoutId);
+          observer.observe(null, responseTopic,
+                           Ci.nsIPermissionManager.DENY_ACTION);
+        }
+      }
+    ];
+
+    // This will be set to the result of PopupNotifications.show() below, or to
+    // the result of PopupNotifications.getNotification() if this is a
+    // quotaCancel notification.
+    var notification;
+
+    function timeoutNotification() {
+      // Remove the notification.
+      if (notification) {
+        notification.remove();
+      }
+
+      // Clear all of our timeout stuff. We may be called directly, not just
+      // when the timeout actually elapses.
+      clearTimeout(timeoutId);
+
+      // And tell the page that the popup timed out.
+      observer.observe(null, responseTopic,
+                       Ci.nsIPermissionManager.UNKNOWN_ACTION);
+    }
+
+    var options = {
+      eventCallback: function(state) {
+        // Don't do anything if the timeout has not been set yet.
+        if (!timeoutId) {
+          return;
+        }
+
+        // If the popup is being dismissed start the short timeout.
+        if (state == "dismissed") {
+          clearTimeout(timeoutId);
+          timeoutId = setTimeout(timeoutNotification, hiddenTimeoutDuration);
+          return;
+        }
+
+        // If the popup is being re-shown then clear the timeout allowing
+        // unlimited waiting.
+        if (state == "shown") {
+          clearTimeout(timeoutId);
+        }
+      }
+    };
+
+    if (topic == this._quotaCancel) {
+      notification = PopupNotifications.getNotification(this._quotaPrompt,
+                                                        browser);
+      timeoutNotification();
+      return;
+    }
+
+    notification = PopupNotifications.show(browser, topic, message,
+                                           this._notificationIcon, mainAction,
+                                           secondaryActions, options);
+
+    // Set the timeoutId after the popup has been created, and use the long
+    // timeout value. If the user doesn't notice the popup after this amount of
+    // time then it is most likely not visible and we want to alert the page.
+    timeoutId = setTimeout(timeoutNotification, firstTimeoutDuration);
+  }
+};
+
+var CanvasPermissionPromptHelper = {
+  _permissionsPrompt: "canvas-permissions-prompt",
+  _notificationIcon: "canvas-notification-icon",
+
+  init:
+  function CanvasPermissionPromptHelper_init() {
+    if (document.styleSheets && (document.styleSheets.length > 0)) try {
+      let ruleText = "panel[popupid=canvas-permissions-prompt] description { white-space: pre-wrap; }";
+      let sheet = document.styleSheets[0];
+      sheet.insertRule(ruleText, sheet.cssRules.length);
+    } catch (e) {};
+
+    Services.obs.addObserver(this, this._permissionsPrompt, false);
+  },
+
+  uninit:
+  function CanvasPermissionPromptHelper_uninit() {
+    Services.obs.removeObserver(this, this._permissionsPrompt, false);
+  },
+
+  // aSubject is an nsIDOMWindow.
+  // aData is an URL string.
+  observe:
+  function CanvasPermissionPromptHelper_observe(aSubject, aTopic, aData) {
+    if ((aTopic != this._permissionsPrompt) || !aData)
+      throw new Error("Unexpected topic or missing URL");
+
+    var uri = makeURI(aData);
+    var contentWindow = aSubject.QueryInterface(Ci.nsIDOMWindow);
+    var contentDocument = contentWindow.document;
+    var browserWindow =
+      OfflineApps._getBrowserWindowForContentWindow(contentWindow);
+
+    if (browserWindow != window) {
+      // Must belong to some other window.
+      return;
+    }
+
+    // If canvas prompt is already displayed, just return.  This is OK (and
+    // more efficient) since this permission is associated with the top
+    // browser's URL.
+    if (PopupNotifications.getNotification(aTopic, browser))
+      return;
+
+    var bundleSvc = Cc["@mozilla.org/intl/stringbundle;1"].
+                        getService(Ci.nsIStringBundleService);
+    var torBtnBundle;
+    try {
+      torBtnBundle = bundleSvc.createBundle(
+                             "chrome://torbutton/locale/torbutton.properties");
+    } catch (e) {}
+
+    var message = getLocalizedString("canvas.siteprompt", [ uri.asciiHost ]);
+
+    var mainAction = {
+      label: getLocalizedString("canvas.notNow"),
+      accessKey: getLocalizedString("canvas.notNowAccessKey"),
+      callback: function() {
+        return null;
+      }
+    };
+
+    var secondaryActions = [
+      {
+        label: getLocalizedString("canvas.never"),
+        accessKey: getLocalizedString("canvas.neverAccessKey"),
+        callback: function() {
+          setCanvasPermission(uri, Ci.nsIPermissionManager.DENY_ACTION);
+        }
+      },
+      {
+        label: getLocalizedString("canvas.allow"),
+        accessKey: getLocalizedString("canvas.allowAccessKey"),
+        callback: function() {
+            setCanvasPermission(uri, Ci.nsIPermissionManager.ALLOW_ACTION);
+        }
+      }
+    ];
+
+    // Since we have a process in place to perform localization for the
+    // Torbutton extension, get our strings from the extension if possible.
+    function getLocalizedString(aID, aParams) {
+      var s;
+      if (torBtnBundle) try {
+        if (aParams)
+          s = torBtnBundle.formatStringFromName(aID, aParams, aParams.length);
+        else
+          s = torBtnBundle.GetStringFromName(aID);
+      } catch (e) {}
+
+      if (!s) {
+        if (aParams)
+          s = gNavigatorBundle.getFormattedString(aID, aParams);
+        else
+          s = gNavigatorBundle.getString(aID);
+      }
+
+      return s;
+    }
+
+    function setCanvasPermission(aURI, aPerm) {
+      Services.perms.add(aURI, "canvas/extractData", aPerm,
+                         Ci.nsIPermissionManager.EXPIRE_NEVER);
+    }
+
+    var browser = OfflineApps._getBrowserForContentWindow(browserWindow,
+                                                          contentWindow);
+    notification = PopupNotifications.show(browser, aTopic, message,
+                                           this._notificationIcon, mainAction,
+                                           secondaryActions, null);
+  }
+};
+
+function WindowIsClosing()
+{
+  if (TabView.isVisible()) {
+    TabView.hide();
+    return false;
+  }
+
+  if (!closeWindow(false, warnAboutClosingWindow))
+    return false;
+
+  // Bug 967873 - Proxy nsDocumentViewer::PermitUnload to the child process
+  if (gMultiProcessBrowser)
+    return true;
+
+  for (let browser of gBrowser.browsers) {
+    let ds = browser.docShell;
+    if (ds.contentViewer && !ds.contentViewer.permitUnload())
+      return false;
+  }
+
+  return true;
+}
+
+/**
+ * Checks if this is the last full *browser* window around. If it is, this will
+ * be communicated like quitting. Otherwise, we warn about closing multiple tabs.
+ * @returns true if closing can proceed, false if it got cancelled.
+ */
+function warnAboutClosingWindow() {
+  // Popups aren't considered full browser windows; we also ignore private windows.
+  let isPBWindow = PrivateBrowsingUtils.isWindowPrivate(window) &&
+        !PrivateBrowsingUtils.permanentPrivateBrowsing;
+  if (!isPBWindow && !toolbar.visible)
+    return gBrowser.warnAboutClosingTabs(gBrowser.closingTabsEnum.ALL);
+
+  // Figure out if there's at least one other browser window around.
+  let e = Services.wm.getEnumerator("navigator:browser");
+  let otherPBWindowExists = false;
+  let nonPopupPresent = false;
+  while (e.hasMoreElements()) {
+    let win = e.getNext();
+    if (!win.closed && win != window) {
+      if (isPBWindow && PrivateBrowsingUtils.isWindowPrivate(win))
+        otherPBWindowExists = true;
+      if (win.toolbar.visible)
+        nonPopupPresent = true;
+      // If the current window is not in private browsing mode we don't need to 
+      // look for other pb windows, we can leave the loop when finding the 
+      // first non-popup window. If however the current window is in private 
+      // browsing mode then we need at least one other pb and one non-popup 
+      // window to break out early.
+      if ((!isPBWindow || otherPBWindowExists) && nonPopupPresent)
+        break;
+    }
+  }
+
+  if (isPBWindow && !otherPBWindowExists) {
+    let exitingCanceled = Cc["@mozilla.org/supports-PRBool;1"].
+                          createInstance(Ci.nsISupportsPRBool);
+    exitingCanceled.data = false;
+    Services.obs.notifyObservers(exitingCanceled,
+                                 "last-pb-context-exiting",
+                                 null);
+    if (exitingCanceled.data)
+      return false;
+  }
+
+  if (nonPopupPresent) {
+    return isPBWindow || gBrowser.warnAboutClosingTabs(gBrowser.closingTabsEnum.ALL);
+  }
+
+  let os = Services.obs;
+
+  let closingCanceled = Cc["@mozilla.org/supports-PRBool;1"].
+                        createInstance(Ci.nsISupportsPRBool);
+  os.notifyObservers(closingCanceled,
+                     "browser-lastwindow-close-requested", null);
+  if (closingCanceled.data)
+    return false;
+
+  os.notifyObservers(null, "browser-lastwindow-close-granted", null);
+
+#ifdef XP_MACOSX
+  // OS X doesn't quit the application when the last window is closed, but keeps
+  // the session alive. Hence don't prompt users to save tabs, but warn about
+  // closing multiple tabs.
+  return isPBWindow || gBrowser.warnAboutClosingTabs(gBrowser.closingTabsEnum.ALL);
+#else
+  return true;
+#endif
+}
+
+var MailIntegration = {
+  sendLinkForWindow: function (aWindow) {
+    this.sendMessage(aWindow.location.href,
+                     aWindow.document.title);
+  },
+
+  sendMessage: function (aBody, aSubject) {
+    // generate a mailto url based on the url and the url's title
+    var mailtoUrl = "mailto:";
+    if (aBody) {
+      mailtoUrl += "?body=" + encodeURIComponent(aBody);
+      mailtoUrl += "&subject=" + encodeURIComponent(aSubject);
+    }
+
+    var uri = makeURI(mailtoUrl);
+
+    // now pass this uri to the operating system
+    this._launchExternalUrl(uri);
+  },
+
+  // a generic method which can be used to pass arbitrary urls to the operating
+  // system.
+  // aURL --> a nsIURI which represents the url to launch
+  _launchExternalUrl: function (aURL) {
+    var extProtocolSvc =
+       Cc["@mozilla.org/uriloader/external-protocol-service;1"]
+         .getService(Ci.nsIExternalProtocolService);
+    if (extProtocolSvc)
+      extProtocolSvc.loadUrl(aURL);
+  }
+};
+
+function BrowserOpenAddonsMgr(aView) {
+  if (aView) {
+    let emWindow;
+    let browserWindow;
+
+    var receivePong = function receivePong(aSubject, aTopic, aData) {
+      let browserWin = aSubject.QueryInterface(Ci.nsIInterfaceRequestor)
+                               .getInterface(Ci.nsIWebNavigation)
+                               .QueryInterface(Ci.nsIDocShellTreeItem)
+                               .rootTreeItem
+                               .QueryInterface(Ci.nsIInterfaceRequestor)
+                               .getInterface(Ci.nsIDOMWindow);
+      if (!emWindow || browserWin == window /* favor the current window */) {
+        emWindow = aSubject;
+        browserWindow = browserWin;
+      }
+    }
+    Services.obs.addObserver(receivePong, "EM-pong", false);
+    Services.obs.notifyObservers(null, "EM-ping", "");
+    Services.obs.removeObserver(receivePong, "EM-pong");
+
+    if (emWindow) {
+      emWindow.loadView(aView);
+      browserWindow.gBrowser.selectedTab =
+        browserWindow.gBrowser._getTabForContentWindow(emWindow);
+      emWindow.focus();
+      return;
+    }
+  }
+
+  var newLoad = !switchToTabHavingURI("about:addons", true);
+
+  if (aView) {
+    // This must be a new load, else the ping/pong would have
+    // found the window above.
+    Services.obs.addObserver(function observer(aSubject, aTopic, aData) {
+      Services.obs.removeObserver(observer, aTopic);
+      aSubject.loadView(aView);
+    }, "EM-loaded", false);
+  }
+}
+
+function GetSearchFieldBookmarkData(node) {
+  var charset = node.ownerDocument.characterSet;
+
+  var formBaseURI = makeURI(node.form.baseURI,
+                            charset);
+
+  var formURI = makeURI(node.form.getAttribute("action"),
+                        charset,
+                        formBaseURI);
+
+  var spec = formURI.spec;
+
+  var isURLEncoded =
+               (node.form.method.toUpperCase() == "POST"
+                && (node.form.enctype == "application/x-www-form-urlencoded" ||
+                    node.form.enctype == ""));
+
+  var title = gNavigatorBundle.getFormattedString("addKeywordTitleAutoFill",
+                                                  [node.ownerDocument.title]);
+  var description = PlacesUIUtils.getDescriptionFromDocument(node.ownerDocument);
+
+  var formData = [];
+
+  function escapeNameValuePair(aName, aValue, aIsFormUrlEncoded) {
+    if (aIsFormUrlEncoded)
+      return escape(aName + "=" + aValue);
+    else
+      return escape(aName) + "=" + escape(aValue);
+  }
+
+  for (let el of node.form.elements) {
+    if (!el.type) // happens with fieldsets
+      continue;
+
+    if (el == node) {
+      formData.push((isURLEncoded) ? escapeNameValuePair(el.name, "%s", true) :
+                                     // Don't escape "%s", just append
+                                     escapeNameValuePair(el.name, "", false) + "%s");
+      continue;
+    }
+
+    let type = el.type.toLowerCase();
+
+    if (((el instanceof HTMLInputElement && el.mozIsTextField(true)) ||
+        type == "hidden" || type == "textarea") ||
+        ((type == "checkbox" || type == "radio") && el.checked)) {
+      formData.push(escapeNameValuePair(el.name, el.value, isURLEncoded));
+    } else if (el instanceof HTMLSelectElement && el.selectedIndex >= 0) {
+      for (var j=0; j < el.options.length; j++) {
+        if (el.options[j].selected)
+          formData.push(escapeNameValuePair(el.name, el.options[j].value,
+                                            isURLEncoded));
+      }
+    }
+  }
+
+  var postData;
+
+  if (isURLEncoded)
+    postData = formData.join("&");
+  else
+    spec += "?" + formData.join("&");
+
+  return {
+    spec: spec,
+    title: title,
+    description: description,
+    postData: postData,
+    charSet: charset
+  };
+}
+
+
+function AddKeywordForSearchField() {
+  bookmarkData = GetSearchFieldBookmarkData(document.popupNode);
+
+  PlacesUIUtils.showBookmarkDialog({ action: "add"
+                                   , type: "bookmark"
+                                   , uri: makeURI(bookmarkData.spec)
+                                   , title: bookmarkData.title
+                                   , description: bookmarkData.description
+                                   , keyword: ""
+                                   , postData: bookmarkData.postData
+                                   , charSet: bookmarkData.charset
+                                   , hiddenRows: [ "location"
+                                                 , "description"
+                                                 , "tags"
+                                                 , "loadInSidebar" ]
+                                   }, window);
+}
+
+function SwitchDocumentDirection(aWindow) {
+  // document.dir can also be "auto", in which case it won't change
+  if (aWindow.document.dir == "ltr" || aWindow.document.dir == "") {
+    aWindow.document.dir = "rtl";
+  } else if (aWindow.document.dir == "rtl") {
+    aWindow.document.dir = "ltr";
+  }
+  for (var run = 0; run < aWindow.frames.length; run++)
+    SwitchDocumentDirection(aWindow.frames[run]);
+}
+
+function convertFromUnicode(charset, str)
+{
+  try {
+    var unicodeConverter = Components
+       .classes["@mozilla.org/intl/scriptableunicodeconverter"]
+       .createInstance(Components.interfaces.nsIScriptableUnicodeConverter);
+    unicodeConverter.charset = charset;
+    str = unicodeConverter.ConvertFromUnicode(str);
+    return str + unicodeConverter.Finish();
+  } catch(ex) {
+    return null;
+  }
+}
+
+/**
+ * Re-open a closed tab.
+ * @param aIndex
+ *        The index of the tab (via SessionStore.getClosedTabData)
+ * @returns a reference to the reopened tab.
+ */
+function undoCloseTab(aIndex) {
+  // wallpaper patch to prevent an unnecessary blank tab (bug 343895)
+  var blankTabToRemove = null;
+  if (gBrowser.tabs.length == 1 && isTabEmpty(gBrowser.selectedTab))
+    blankTabToRemove = gBrowser.selectedTab;
+
+  var tab = null;
+  if (SessionStore.getClosedTabCount(window) > (aIndex || 0)) {
+    TabView.prepareUndoCloseTab(blankTabToRemove);
+    tab = SessionStore.undoCloseTab(window, aIndex || 0);
+    TabView.afterUndoCloseTab();
+
+    if (blankTabToRemove)
+      gBrowser.removeTab(blankTabToRemove);
+  }
+
+  return tab;
+}
+
+/**
+ * Re-open a closed window.
+ * @param aIndex
+ *        The index of the window (via SessionStore.getClosedWindowData)
+ * @returns a reference to the reopened window.
+ */
+function undoCloseWindow(aIndex) {
+  let window = null;
+  if (SessionStore.getClosedWindowCount() > (aIndex || 0))
+    window = SessionStore.undoCloseWindow(aIndex || 0);
+
+  return window;
+}
+
+/*
+ * Determines if a tab is "empty", usually used in the context of determining
+ * if it's ok to close the tab.
+ */
+function isTabEmpty(aTab) {
+  if (aTab.hasAttribute("busy"))
+    return false;
+
+  let browser = aTab.linkedBrowser;
+  if (!isBlankPageURL(browser.currentURI.spec))
+    return false;
+
+  // Bug 863515 - Make content.opener checks work in electrolysis.
+  if (!gMultiProcessBrowser && browser.contentWindow.opener)
+    return false;
+
+  if (browser.sessionHistory && browser.sessionHistory.count >= 2)
+    return false;
+
+  return true;
+}
+
+#ifdef MOZ_SERVICES_SYNC
+function BrowserOpenSyncTabs() {
+  switchToTabHavingURI("about:sync-tabs", true);
+}
+#endif
+
+/**
+ * Format a URL
+ * eg:
+ * echo formatURL("https://addons.mozilla.org/%LOCALE%/%APP%/%VERSION%/");
+ * > https://addons.mozilla.org/en-US/firefox/3.0a1/
+ *
+ * Currently supported built-ins are LOCALE, APP, and any value from nsIXULAppInfo, uppercased.
+ */
+function formatURL(aFormat, aIsPref) {
+  var formatter = Cc["@mozilla.org/toolkit/URLFormatterService;1"].getService(Ci.nsIURLFormatter);
+  return aIsPref ? formatter.formatURLPref(aFormat) : formatter.formatURL(aFormat);
+}
+
+/**
+ * Utility object to handle manipulations of the identity indicators in the UI
+ */
+var gIdentityHandler = {
+  // Mode strings used to control CSS display
+  IDENTITY_MODE_IDENTIFIED                             : "verifiedIdentity", // High-quality identity information
+  IDENTITY_MODE_DOMAIN_VERIFIED                        : "verifiedDomain",   // Minimal SSL CA-signed domain verification
+  IDENTITY_MODE_UNKNOWN                                : "unknownIdentity",  // No trusted identity information
+  IDENTITY_MODE_MIXED_DISPLAY_LOADED                   : "unknownIdentity mixedContent mixedDisplayContent",  // SSL with unauthenticated display content
+  IDENTITY_MODE_MIXED_ACTIVE_LOADED                    : "unknownIdentity mixedContent mixedActiveContent",  // SSL with unauthenticated active (and perhaps also display) content
+  IDENTITY_MODE_MIXED_DISPLAY_LOADED_ACTIVE_BLOCKED    : "unknownIdentity mixedContent mixedDisplayContentLoadedActiveBlocked",  // SSL with unauthenticated display content; unauthenticated active content is blocked.
+  IDENTITY_MODE_CHROMEUI                               : "chromeUI",         // Part of the product's UI
+
+  // Cache the most recent SSLStatus and Location seen in checkIdentity
+  _lastStatus : null,
+  _lastUri : null,
+  _mode : "unknownIdentity",
+
+  // smart getters
+  get _encryptionLabel () {
+    delete this._encryptionLabel;
+    this._encryptionLabel = {};
+    this._encryptionLabel[this.IDENTITY_MODE_DOMAIN_VERIFIED] =
+      gNavigatorBundle.getString("identity.encrypted2");
+    this._encryptionLabel[this.IDENTITY_MODE_IDENTIFIED] =
+      gNavigatorBundle.getString("identity.encrypted2");
+    this._encryptionLabel[this.IDENTITY_MODE_UNKNOWN] =
+      gNavigatorBundle.getString("identity.unencrypted");
+    this._encryptionLabel[this.IDENTITY_MODE_MIXED_DISPLAY_LOADED] =
+      gNavigatorBundle.getString("identity.mixed_display_loaded");
+    this._encryptionLabel[this.IDENTITY_MODE_MIXED_ACTIVE_LOADED] =
+      gNavigatorBundle.getString("identity.mixed_active_loaded2");
+    this._encryptionLabel[this.IDENTITY_MODE_MIXED_DISPLAY_LOADED_ACTIVE_BLOCKED] =
+      gNavigatorBundle.getString("identity.mixed_display_loaded");
+    return this._encryptionLabel;
+  },
+  get _identityPopup () {
+    delete this._identityPopup;
+    return this._identityPopup = document.getElementById("identity-popup");
+  },
+  get _identityBox () {
+    delete this._identityBox;
+    return this._identityBox = document.getElementById("identity-box");
+  },
+  get _identityPopupContentBox () {
+    delete this._identityPopupContentBox;
+    return this._identityPopupContentBox =
+      document.getElementById("identity-popup-content-box");
+  },
+  get _identityPopupChromeLabel () {
+    delete this._identityPopupChromeLabel;
+    return this._identityPopupChromeLabel =
+      document.getElementById("identity-popup-chromeLabel");
+  },
+  get _identityPopupContentHost () {
+    delete this._identityPopupContentHost;
+    return this._identityPopupContentHost =
+      document.getElementById("identity-popup-content-host");
+  },
+  get _identityPopupContentOwner () {
+    delete this._identityPopupContentOwner;
+    return this._identityPopupContentOwner =
+      document.getElementById("identity-popup-content-owner");
+  },
+  get _identityPopupContentSupp () {
+    delete this._identityPopupContentSupp;
+    return this._identityPopupContentSupp =
+      document.getElementById("identity-popup-content-supplemental");
+  },
+  get _identityPopupContentVerif () {
+    delete this._identityPopupContentVerif;
+    return this._identityPopupContentVerif =
+      document.getElementById("identity-popup-content-verifier");
+  },
+  get _identityPopupEncLabel () {
+    delete this._identityPopupEncLabel;
+    return this._identityPopupEncLabel =
+      document.getElementById("identity-popup-encryption-label");
+  },
+  get _identityIconLabel () {
+    delete this._identityIconLabel;
+    return this._identityIconLabel = document.getElementById("identity-icon-label");
+  },
+  get _overrideService () {
+    delete this._overrideService;
+    return this._overrideService = Cc["@mozilla.org/security/certoverride;1"]
+                                     .getService(Ci.nsICertOverrideService);
+  },
+  get _identityIconCountryLabel () {
+    delete this._identityIconCountryLabel;
+    return this._identityIconCountryLabel = document.getElementById("identity-icon-country-label");
+  },
+  get _identityIcon () {
+    delete this._identityIcon;
+    return this._identityIcon = document.getElementById("page-proxy-favicon");
+  },
+  get _permissionsContainer () {
+    delete this._permissionsContainer;
+    return this._permissionsContainer = document.getElementById("identity-popup-permissions");
+  },
+  get _permissionList () {
+    delete this._permissionList;
+    return this._permissionList = document.getElementById("identity-popup-permission-list");
+  },
+
+  /**
+   * Rebuild cache of the elements that may or may not exist depending
+   * on whether there's a location bar.
+   */
+  _cacheElements : function() {
+    delete this._identityBox;
+    delete this._identityIconLabel;
+    delete this._identityIconCountryLabel;
+    delete this._identityIcon;
+    delete this._permissionsContainer;
+    delete this._permissionList;
+    this._identityBox = document.getElementById("identity-box");
+    this._identityIconLabel = document.getElementById("identity-icon-label");
+    this._identityIconCountryLabel = document.getElementById("identity-icon-country-label");
+    this._identityIcon = document.getElementById("page-proxy-favicon");
+    this._permissionsContainer = document.getElementById("identity-popup-permissions");
+    this._permissionList = document.getElementById("identity-popup-permission-list");
+  },
+
+  /**
+   * Handler for commands on the help button in the "identity-popup" panel.
+   */
+  handleHelpCommand : function(event) {
+    openHelpLink("secure-connection");
+    this._identityPopup.hidePopup();
+  },
+
+  /**
+   * Handler for mouseclicks on the "More Information" button in the
+   * "identity-popup" panel.
+   */
+  handleMoreInfoClick : function(event) {
+    displaySecurityInfo();
+    event.stopPropagation();
+    this._identityPopup.hidePopup();
+  },
+
+  /**
+   * Helper to parse out the important parts of _lastStatus (of the SSL cert in
+   * particular) for use in constructing identity UI strings
+  */
+  getIdentityData : function() {
+    var result = {};
+    var status = this._lastStatus.QueryInterface(Components.interfaces.nsISSLStatus);
+    var cert = status.serverCert;
+
+    // Human readable name of Subject
+    result.subjectOrg = cert.organization;
+
+    // SubjectName fields, broken up for individual access
+    if (cert.subjectName) {
+      result.subjectNameFields = {};
+      cert.subjectName.split(",").forEach(function(v) {
+        var field = v.split("=");
+        this[field[0]] = field[1];
+      }, result.subjectNameFields);
+
+      // Call out city, state, and country specifically
+      result.city = result.subjectNameFields.L;
+      result.state = result.subjectNameFields.ST;
+      result.country = result.subjectNameFields.C;
+    }
+
+    // Human readable name of Certificate Authority
+    result.caOrg =  cert.issuerOrganization || cert.issuerCommonName;
+    result.cert = cert;
+
+    return result;
+  },
+
+  /**
+   * Determine the identity of the page being displayed by examining its SSL cert
+   * (if available) and, if necessary, update the UI to reflect this.  Intended to
+   * be called by onSecurityChange
+   *
+   * @param PRUint32 state
+   * @param nsIURI uri The address for which the UI should be updated.
+   */
+  checkIdentity : function(state, uri) {
+    var currentStatus = gBrowser.securityUI
+                                .QueryInterface(Components.interfaces.nsISSLStatusProvider)
+                                .SSLStatus;
+    this._lastStatus = currentStatus;
+    this._lastUri = uri;
+
+    let nsIWebProgressListener = Ci.nsIWebProgressListener;
+
+    // For some URIs like data: we can't get a host and so can't do
+    // anything useful here.
+    let unknown = false;
+    try {
+      uri.host;
+    } catch (e) { unknown = true; }
+
+    // Chrome URIs however get special treatment. Some chrome URIs are
+    // whitelisted to provide a positive security signal to the user.
+    let whitelist = /^about:(accounts|addons|app-manager|config|crashes|customizing|healthreport|home|newaddon|permissions|preferences|privatebrowsing|sessionrestore|support|welcomeback)/i;
+    let isChromeUI = uri.schemeIs("about") && whitelist.test(uri.spec);
+    if (isChromeUI) {
+      this.setMode(this.IDENTITY_MODE_CHROMEUI);
+    } else if (unknown) {
+      this.setMode(this.IDENTITY_MODE_UNKNOWN);
+    } else if (state & nsIWebProgressListener.STATE_IDENTITY_EV_TOPLEVEL) {
+      this.setMode(this.IDENTITY_MODE_IDENTIFIED);
+    } else if (state & nsIWebProgressListener.STATE_IS_SECURE) {
+      this.setMode(this.IDENTITY_MODE_DOMAIN_VERIFIED);
+    } else if (state & nsIWebProgressListener.STATE_IS_BROKEN) {
+      if ((state & nsIWebProgressListener.STATE_LOADED_MIXED_ACTIVE_CONTENT) &&
+          gPrefService.getBoolPref("security.mixed_content.block_active_content")) {
+        this.setMode(this.IDENTITY_MODE_MIXED_ACTIVE_LOADED);
+      } else if ((state & nsIWebProgressListener.STATE_BLOCKED_MIXED_ACTIVE_CONTENT) &&
+                gPrefService.getBoolPref("security.mixed_content.block_active_content")) {
+        this.setMode(this.IDENTITY_MODE_MIXED_DISPLAY_LOADED_ACTIVE_BLOCKED);
+      } else {
+        this.setMode(this.IDENTITY_MODE_MIXED_DISPLAY_LOADED);
+      }
+    } else {
+      this.setMode(this.IDENTITY_MODE_UNKNOWN);
+    }
+
+    // Ensure the doorhanger is shown when mixed active content is blocked.
+    if (state & nsIWebProgressListener.STATE_BLOCKED_MIXED_ACTIVE_CONTENT)
+      this.showMixedContentDoorhanger();
+  },
+
+  /**
+   * Display the Mixed Content Blocker doohanger, providing an option
+   * to the user to override mixed content blocking
+   */
+  showMixedContentDoorhanger : function() {
+    // If we've already got an active notification, bail out to avoid showing it repeatedly.
+    if (PopupNotifications.getNotification("mixed-content-blocked", gBrowser.selectedBrowser))
+      return;
+
+    let brandBundle = document.getElementById("bundle_brand");
+    let brandShortName = brandBundle.getString("brandShortName");
+    let messageString = gNavigatorBundle.getFormattedString("mixedContentBlocked.message", [brandShortName]);
+    let action = {
+      label: gNavigatorBundle.getString("mixedContentBlocked.keepBlockingButton.label"),
+      accessKey: gNavigatorBundle.getString("mixedContentBlocked.keepBlockingButton.accesskey"),
+      callback: function() { /* NOP */ }
+    };
+    let secondaryActions = [
+      {
+        label: gNavigatorBundle.getString("mixedContentBlocked.unblock.label"),
+        accessKey: gNavigatorBundle.getString("mixedContentBlocked.unblock.accesskey"),
+        callback: function() {
+          // Use telemetry to measure how often unblocking happens
+          const kMIXED_CONTENT_UNBLOCK_EVENT = 2;
+          let histogram =
+            Services.telemetry.getHistogramById("MIXED_CONTENT_UNBLOCK_COUNTER");
+          histogram.add(kMIXED_CONTENT_UNBLOCK_EVENT);
+          // Reload the page with the content unblocked
+          BrowserReloadWithFlags(nsIWebNavigation.LOAD_FLAGS_ALLOW_MIXED_CONTENT);
+        }
+      }
+    ];
+    let options = {
+      dismissed: true,
+      learnMoreURL: Services.urlFormatter.formatURLPref("app.support.baseURL") + "mixed-content",
+    };
+    PopupNotifications.show(gBrowser.selectedBrowser, "mixed-content-blocked",
+                            messageString, "mixed-content-blocked-notification-icon",
+                            action, secondaryActions, options);
+  },
+
+  /**
+   * Return the eTLD+1 version of the current hostname
+   */
+  getEffectiveHost : function() {
+    if (!this._IDNService)
+      this._IDNService = Cc["@mozilla.org/network/idn-service;1"]
+                         .getService(Ci.nsIIDNService);
+    try {
+      let baseDomain =
+        Services.eTLD.getBaseDomainFromHost(this._lastUri.host);
+      return this._IDNService.convertToDisplayIDN(baseDomain, {});
+    } catch (e) {
+      // If something goes wrong (e.g. host is an IP address) just fail back
+      // to the full domain.
+      return this._lastUri.host;
+    }
+  },
+
+  /**
+   * Update the UI to reflect the specified mode, which should be one of the
+   * IDENTITY_MODE_* constants.
+   */
+  setMode : function(newMode) {
+    if (!this._identityBox) {
+      // No identity box means the identity box is not visible, in which
+      // case there's nothing to do.
+      return;
+    }
+
+    this._identityPopup.className = newMode;
+    this._identityBox.className = newMode;
+    this.setIdentityMessages(newMode);
+
+    // Update the popup too, if it's open
+    if (this._identityPopup.state == "open")
+      this.setPopupMessages(newMode);
+
+    this._mode = newMode;
+  },
+
+  /**
+   * Set up the messages for the primary identity UI based on the specified mode,
+   * and the details of the SSL cert, where applicable
+   *
+   * @param newMode The newly set identity mode.  Should be one of the IDENTITY_MODE_* constants.
+   */
+  setIdentityMessages : function(newMode) {
+    let icon_label = "";
+    let tooltip = "";
+    let icon_country_label = "";
+    let icon_labels_dir = "ltr";
+
+    switch (newMode) {
+    case this.IDENTITY_MODE_DOMAIN_VERIFIED: {
+      let iData = this.getIdentityData();
+
+      // Verifier is either the CA Org, for a normal cert, or a special string
+      // for certs that are trusted because of a security exception.
+      tooltip = gNavigatorBundle.getFormattedString("identity.identified.verifier",
+                                                    [iData.caOrg]);
+
+      // This can't throw, because URI's with a host that throw don't end up in this case.
+      let host = this._lastUri.host;
+      let port = 443;
+      try {
+        if (this._lastUri.port > 0)
+          port = this._lastUri.port;
+      } catch (e) {}
+
+      if (this._overrideService.hasMatchingOverride(host, port, iData.cert, {}, {}))
+        tooltip = gNavigatorBundle.getString("identity.identified.verified_by_you");
+
+      break; }
+    case this.IDENTITY_MODE_IDENTIFIED: {
+      // If it's identified, then we can populate the dialog with credentials
+      let iData = this.getIdentityData();
+      tooltip = gNavigatorBundle.getFormattedString("identity.identified.verifier",
+                                                    [iData.caOrg]);
+      icon_label = iData.subjectOrg;
+      if (iData.country)
+        icon_country_label = "(" + iData.country + ")";
+
+      // If the organization name starts with an RTL character, then
+      // swap the positions of the organization and country code labels.
+      // The Unicode ranges reflect the definition of the UCS2_CHAR_IS_BIDI
+      // macro in intl/unicharutil/util/nsBidiUtils.h. When bug 218823 gets
+      // fixed, this test should be replaced by one adhering to the
+      // Unicode Bidirectional Algorithm proper (at the paragraph level).
+      icon_labels_dir = /^[\u0590-\u08ff\ufb1d-\ufdff\ufe70-\ufefc]/.test(icon_label) ?
+                        "rtl" : "ltr";
+      break; }
+    case this.IDENTITY_MODE_CHROMEUI:
+      let brandBundle = document.getElementById("bundle_brand");
+      icon_label = brandBundle.getString("brandShortName");
+      break;
+    default:
+      tooltip = gNavigatorBundle.getString("identity.unknown.tooltip");
+    }
+
+    // Push the appropriate strings out to the UI
+    this._identityBox.tooltipText = tooltip;
+    this._identityIconLabel.value = icon_label;
+    this._identityIconCountryLabel.value = icon_country_label;
+    // Set cropping and direction
+    this._identityIconLabel.crop = icon_country_label ? "end" : "center";
+    this._identityIconLabel.parentNode.style.direction = icon_labels_dir;
+    // Hide completely if the organization label is empty
+    this._identityIconLabel.parentNode.collapsed = icon_label ? false : true;
+  },
+
+  /**
+   * Set up the title and content messages for the identity message popup,
+   * based on the specified mode, and the details of the SSL cert, where
+   * applicable
+   *
+   * @param newMode The newly set identity mode.  Should be one of the IDENTITY_MODE_* constants.
+   */
+  setPopupMessages : function(newMode) {
+
+    this._identityPopup.className = newMode;
+    this._identityPopupContentBox.className = newMode;
+
+    // Set the static strings up front
+    this._identityPopupEncLabel.textContent = this._encryptionLabel[newMode];
+
+    // Initialize the optional strings to empty values
+    let supplemental = "";
+    let verifier = "";
+    let host = "";
+    let owner = "";
+
+    switch (newMode) {
+    case this.IDENTITY_MODE_DOMAIN_VERIFIED:
+      host = this.getEffectiveHost();
+      owner = gNavigatorBundle.getString("identity.ownerUnknown2");
+      verifier = this._identityBox.tooltipText;
+      break;
+    case this.IDENTITY_MODE_IDENTIFIED: {
+      // If it's identified, then we can populate the dialog with credentials
+      let iData = this.getIdentityData();
+      host = this.getEffectiveHost();
+      owner = iData.subjectOrg;
+      verifier = this._identityBox.tooltipText;
+
+      // Build an appropriate supplemental block out of whatever location data we have
+      if (iData.city)
+        supplemental += iData.city + "\n";
+      if (iData.state && iData.country)
+        supplemental += gNavigatorBundle.getFormattedString("identity.identified.state_and_country",
+                                                            [iData.state, iData.country]);
+      else if (iData.state) // State only
+        supplemental += iData.state;
+      else if (iData.country) // Country only
+        supplemental += iData.country;
+      break; }
+    case this.IDENTITY_MODE_CHROMEUI: {
+      let brandBundle = document.getElementById("bundle_brand");
+      let brandShortName = brandBundle.getString("brandShortName");
+      this._identityPopupChromeLabel.textContent = gNavigatorBundle.getFormattedString("identity.chrome",
+                                                                                       [brandShortName]);
+      break; }
+    }
+
+    // Push the appropriate strings out to the UI
+    this._identityPopupContentHost.textContent = host;
+    this._identityPopupContentOwner.textContent = owner;
+    this._identityPopupContentSupp.textContent = supplemental;
+    this._identityPopupContentVerif.textContent = verifier;
+  },
+
+  /**
+   * Click handler for the identity-box element in primary chrome.
+   */
+  handleIdentityButtonEvent : function(event) {
+    event.stopPropagation();
+
+    if ((event.type == "click" && event.button != 0) ||
+        (event.type == "keypress" && event.charCode != KeyEvent.DOM_VK_SPACE &&
+         event.keyCode != KeyEvent.DOM_VK_RETURN)) {
+      return; // Left click, space or enter only
+    }
+
+    // Don't allow left click, space or enter if the location has been modified.
+    if (gURLBar.getAttribute("pageproxystate") != "valid") {
+      return;
+    }
+
+    // Make sure that the display:none style we set in xul is removed now that
+    // the popup is actually needed
+    this._identityPopup.hidden = false;
+
+    // Update the popup strings
+    this.setPopupMessages(this._identityBox.className);
+
+    this.updateSitePermissions();
+
+    // Add the "open" attribute to the identity box for styling
+    this._identityBox.setAttribute("open", "true");
+    var self = this;
+    this._identityPopup.addEventListener("popuphidden", function onPopupHidden(e) {
+      e.currentTarget.removeEventListener("popuphidden", onPopupHidden, false);
+      self._identityBox.removeAttribute("open");
+    }, false);
+
+    // Now open the popup, anchored off the primary chrome element
+    this._identityPopup.openPopup(this._identityIcon, "bottomcenter topleft");
+  },
+
+  onPopupShown : function(event) {
+    document.getElementById('identity-popup-more-info-button').focus();
+
+    this._identityPopup.addEventListener("blur", this, true);
+    this._identityPopup.addEventListener("popuphidden", this);
+  },
+
+  onDragStart: function (event) {
+    if (gURLBar.getAttribute("pageproxystate") != "valid")
+      return;
+
+    var value = content.location.href;
+    var urlString = value + "\n" + content.document.title;
+    var htmlString = "<a href=\"" + value + "\">" + value + "</a>";
+
+    var dt = event.dataTransfer;
+    dt.setData("text/x-moz-url", urlString);
+    dt.setData("text/uri-list", value);
+    dt.setData("text/plain", value);
+    dt.setData("text/html", htmlString);
+    dt.setDragImage(gProxyFavIcon, 16, 16);
+  },
+ 
+  handleEvent: function (event) {
+    switch (event.type) {
+      case "blur":
+        // Focus hasn't moved yet, need to wait until after the blur event.
+        setTimeout(() => {
+          if (document.activeElement &&
+              document.activeElement.compareDocumentPosition(this._identityPopup) &
+                Node.DOCUMENT_POSITION_CONTAINS)
+            return;
+
+          this._identityPopup.hidePopup();
+        }, 0);
+        break;
+      case "popuphidden":
+        this._identityPopup.removeEventListener("blur", this, true);
+        this._identityPopup.removeEventListener("popuphidden", this);
+        break;
+    }
+  },
+
+  updateSitePermissions: function () {
+    while (this._permissionList.hasChildNodes())
+      this._permissionList.removeChild(this._permissionList.lastChild);
+
+    let uri = gBrowser.currentURI;
+
+    for (let permission of SitePermissions.listPermissions()) {
+      let state = SitePermissions.get(uri, permission);
+
+      if (state == SitePermissions.UNKNOWN)
+        continue;
+
+      let item = this._createPermissionItem(permission, state);
+      this._permissionList.appendChild(item);
+    }
+
+    this._permissionsContainer.hidden = !this._permissionList.hasChildNodes();
+  },
+
+  setPermission: function (aPermission, aState) {
+    if (aState == SitePermissions.getDefault(aPermission))
+      SitePermissions.remove(gBrowser.currentURI, aPermission);
+    else
+      SitePermissions.set(gBrowser.currentURI, aPermission, aState);
+  },
+
+  _createPermissionItem: function (aPermission, aState) {
+    let menulist = document.createElement("menulist");
+    let menupopup = document.createElement("menupopup");
+    for (let state of SitePermissions.getAvailableStates(aPermission)) {
+      let menuitem = document.createElement("menuitem");
+      menuitem.setAttribute("value", state);
+      menuitem.setAttribute("label", SitePermissions.getStateLabel(aPermission, state));
+      menupopup.appendChild(menuitem);
+    }
+    menulist.appendChild(menupopup);
+    menulist.setAttribute("value", aState);
+    menulist.setAttribute("oncommand", "gIdentityHandler.setPermission('" +
+                                       aPermission + "', this.value)");
+    menulist.setAttribute("id", "identity-popup-permission:" + aPermission);
+
+    let label = document.createElement("label");
+    label.setAttribute("flex", "1");
+    label.setAttribute("control", menulist.getAttribute("id"));
+    label.setAttribute("value", SitePermissions.getPermissionLabel(aPermission));
+
+    let container = document.createElement("hbox");
+    container.setAttribute("align", "center");
+    container.appendChild(label);
+    container.appendChild(menulist);
+    return container;
+  }
+};
+
+function getNotificationBox(aWindow) {
+  var foundBrowser = gBrowser.getBrowserForDocument(aWindow.document);
+  if (foundBrowser)
+    return gBrowser.getNotificationBox(foundBrowser)
+  return null;
+};
+
+function getTabModalPromptBox(aWindow) {
+  var foundBrowser = gBrowser.getBrowserForDocument(aWindow.document);
+  if (foundBrowser)
+    return gBrowser.getTabModalPromptBox(foundBrowser);
+  return null;
+};
+
+/* DEPRECATED */
+function getBrowser() gBrowser;
+function getNavToolbox() gNavToolbox;
+
+let gPrivateBrowsingUI = {
+  init: function PBUI_init() {
+    // Do nothing for normal windows
+    if (!PrivateBrowsingUtils.isWindowPrivate(window)) {
+      return;
+    }
+
+    // Disable the Clear Recent History... menu item when in PB mode
+    // temporary fix until bug 463607 is fixed
+    document.getElementById("Tools:Sanitize").setAttribute("disabled", "true");
+
+    if (window.location.href == getBrowserURL()) {
+      // Adjust the window's title
+      let docElement = document.documentElement;
+      if (!PrivateBrowsingUtils.permanentPrivateBrowsing) {
+        docElement.setAttribute("title",
+          docElement.getAttribute("title_privatebrowsing"));
+        docElement.setAttribute("titlemodifier",
+          docElement.getAttribute("titlemodifier_privatebrowsing"));
+      }
+      docElement.setAttribute("privatebrowsingmode",
+        PrivateBrowsingUtils.permanentPrivateBrowsing ? "permanent" : "temporary");
+      gBrowser.updateTitlebar();
+
+      if (PrivateBrowsingUtils.permanentPrivateBrowsing) {
+        // Adjust the New Window menu entries
+        [
+          { normal: "menu_newNavigator", private: "menu_newPrivateWindow" },
+        ].forEach(function(menu) {
+          let newWindow = document.getElementById(menu.normal);
+          let newPrivateWindow = document.getElementById(menu.private);
+          if (newWindow && newPrivateWindow) {
+            newPrivateWindow.hidden = true;
+            newWindow.label = newPrivateWindow.label;
+            newWindow.accessKey = newPrivateWindow.accessKey;
+            newWindow.command = newPrivateWindow.command;
+          }
+        });
+      }
+    }
+
+    if (gURLBar &&
+        !PrivateBrowsingUtils.permanentPrivateBrowsing) {
+      // Disable switch to tab autocompletion for private windows 
+      // (not for "Always use private browsing" mode)
+      gURLBar.setAttribute("autocompletesearchparam", "");
+    }
+  }
+};
+
+let gRemoteTabsUI = {
+  init: function() {
+    if (window.location.href != getBrowserURL()) {
+      return;
+    }
+
+    let remoteTabs = gPrefService.getBoolPref("browser.tabs.remote");
+    let autostart = gPrefService.getBoolPref("browser.tabs.remote.autostart");
+
+    let newRemoteWindow = document.getElementById("menu_newRemoteWindow");
+    let newNonRemoteWindow = document.getElementById("menu_newNonRemoteWindow");
+
+    if (!remoteTabs) {
+      newRemoteWindow.hidden = true;
+      newNonRemoteWindow.hidden = true;
+      return;
+    }
+
+    newRemoteWindow.hidden = autostart;
+    newNonRemoteWindow.hidden = !autostart;
+  }
+};
+
+/**
+ * Switch to a tab that has a given URI, and focusses its browser window.
+ * If a matching tab is in this window, it will be switched to. Otherwise, other
+ * windows will be searched.
+ *
+ * @param aURI
+ *        URI to search for
+ * @param aOpenNew
+ *        True to open a new tab and switch to it, if no existing tab is found.
+ *        If no suitable window is found, a new one will be opened.
+ * @param aOpenParams
+ *        If switching to this URI results in us opening a tab, aOpenParams
+ *        will be the parameter object that gets passed to openUILinkIn. Please
+ *        see the documentation for openUILinkIn to see what parameters can be
+ *        passed via this object.
+ * @return True if an existing tab was found, false otherwise
+ */
+function switchToTabHavingURI(aURI, aOpenNew, aOpenParams) {
+  // Certain URLs can be switched to irrespective of the source or destination
+  // window being in private browsing mode:
+  const kPrivateBrowsingWhitelist = new Set([
+    "about:customizing",
+  ]);
+  // This will switch to the tab in aWindow having aURI, if present.
+  function switchIfURIInWindow(aWindow) {
+    // Only switch to the tab if neither the source nor the destination window
+    // are private and they are not in permanent private browsing mode
+    if (!kPrivateBrowsingWhitelist.has(aURI.spec) &&
+        (PrivateBrowsingUtils.isWindowPrivate(window) ||
+         PrivateBrowsingUtils.isWindowPrivate(aWindow)) &&
+        !PrivateBrowsingUtils.permanentPrivateBrowsing) {
+      return false;
+    }
+
+    let browsers = aWindow.gBrowser.browsers;
+    for (let i = 0; i < browsers.length; i++) {
+      let browser = browsers[i];
+      if (browser.currentURI.equals(aURI)) {
+        // Focus the matching window & tab
+        aWindow.focus();
+        aWindow.gBrowser.tabContainer.selectedIndex = i;
+        return true;
+      }
+    }
+    return false;
+  }
+
+  // This can be passed either nsIURI or a string.
+  if (!(aURI instanceof Ci.nsIURI))
+    aURI = Services.io.newURI(aURI, null, null);
+
+  let isBrowserWindow = !!window.gBrowser;
+
+  // Prioritise this window.
+  if (isBrowserWindow && switchIfURIInWindow(window))
+    return true;
+
+  let winEnum = Services.wm.getEnumerator("navigator:browser");
+  while (winEnum.hasMoreElements()) {
+    let browserWin = winEnum.getNext();
+    // Skip closed (but not yet destroyed) windows,
+    // and the current window (which was checked earlier).
+    if (browserWin.closed || browserWin == window)
+      continue;
+    if (switchIfURIInWindow(browserWin))
+      return true;
+  }
+
+  // No opened tab has that url.
+  if (aOpenNew) {
+    if (isBrowserWindow && isTabEmpty(gBrowser.selectedTab))
+      openUILinkIn(aURI.spec, "current", aOpenParams);
+    else
+      openUILinkIn(aURI.spec, "tab", aOpenParams);
+  }
+
+  return false;
+}
+
+let RestoreLastSessionObserver = {
+  init: function () {
+    if (SessionStore.canRestoreLastSession &&
+        !PrivateBrowsingUtils.isWindowPrivate(window)) {
+      Services.obs.addObserver(this, "sessionstore-last-session-cleared", true);
+      goSetCommandEnabled("Browser:RestoreLastSession", true);
+    }
+  },
+
+  observe: function () {
+    // The last session can only be restored once so there's
+    // no way we need to re-enable our menu item.
+    Services.obs.removeObserver(this, "sessionstore-last-session-cleared");
+    goSetCommandEnabled("Browser:RestoreLastSession", false);
+  },
+
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
+                                         Ci.nsISupportsWeakReference])
+};
+
+function restoreLastSession() {
+  SessionStore.restoreLastSession();
+}
+
+var TabContextMenu = {
+  contextTab: null,
+  updateContextMenu: function updateContextMenu(aPopupMenu) {
+    this.contextTab = aPopupMenu.triggerNode.localName == "tab" ?
+                      aPopupMenu.triggerNode : gBrowser.selectedTab;
+    let disabled = gBrowser.tabs.length == 1;
+
+    var menuItems = aPopupMenu.getElementsByAttribute("tbattr", "tabbrowser-multiple");
+    for (let menuItem of menuItems)
+      menuItem.disabled = disabled;
+
+    disabled = gBrowser.visibleTabs.length == 1;
+    menuItems = aPopupMenu.getElementsByAttribute("tbattr", "tabbrowser-multiple-visible");
+    for (let menuItem of menuItems)
+      menuItem.disabled = disabled;
+
+    // Session store
+    document.getElementById("context_undoCloseTab").disabled =
+      SessionStore.getClosedTabCount(window) == 0;
+
+    // Only one of pin/unpin should be visible
+    document.getElementById("context_pinTab").hidden = this.contextTab.pinned;
+    document.getElementById("context_unpinTab").hidden = !this.contextTab.pinned;
+
+    // Disable "Close Tabs to the Right" if there are no tabs
+    // following it and hide it when the user rightclicked on a pinned
+    // tab.
+    document.getElementById("context_closeTabsToTheEnd").disabled =
+      gBrowser.getTabsToTheEndFrom(this.contextTab).length == 0;
+    document.getElementById("context_closeTabsToTheEnd").hidden = this.contextTab.pinned;
+
+    // Disable "Close other Tabs" if there is only one unpinned tab and
+    // hide it when the user rightclicked on a pinned tab.
+    let unpinnedTabs = gBrowser.visibleTabs.length - gBrowser._numPinnedTabs;
+    document.getElementById("context_closeOtherTabs").disabled = unpinnedTabs <= 1;
+    document.getElementById("context_closeOtherTabs").hidden = this.contextTab.pinned;
+
+    // Hide "Bookmark All Tabs" for a pinned tab.  Update its state if visible.
+    let bookmarkAllTabs = document.getElementById("context_bookmarkAllTabs");
+    bookmarkAllTabs.hidden = this.contextTab.pinned;
+    if (!bookmarkAllTabs.hidden)
+      PlacesCommandHook.updateBookmarkAllTabsCommand();
+
+    // Hide "Move to Group" if it's a pinned tab.
+    document.getElementById("context_tabViewMenu").hidden =
+      (this.contextTab.pinned || !TabView.firstUseExperienced);
+  }
+};
+
+XPCOMUtils.defineLazyModuleGetter(this, "gDevTools",
+                                  "resource:///modules/devtools/gDevTools.jsm");
+
+XPCOMUtils.defineLazyModuleGetter(this, "gDevToolsBrowser",
+                                  "resource:///modules/devtools/gDevTools.jsm");
+
+Object.defineProperty(this, "HUDService", {
+  get: function HUDService_getter() {
+    let devtools = Cu.import("resource://gre/modules/devtools/Loader.jsm", {}).devtools;
+    return devtools.require("devtools/webconsole/hudservice");
+  },
+  configurable: true,
+  enumerable: true
+});
+
+// Prompt user to restart the browser in safe mode
+function safeModeRestart()
+{
+  // prompt the user to confirm
+  let promptTitle = gNavigatorBundle.getString("safeModeRestartPromptTitle");
+  let promptMessage =
+    gNavigatorBundle.getString("safeModeRestartPromptMessage");
+  let restartText = gNavigatorBundle.getString("safeModeRestartButton");
+  let buttonFlags = (Services.prompt.BUTTON_POS_0 *
+                     Services.prompt.BUTTON_TITLE_IS_STRING) +
+                    (Services.prompt.BUTTON_POS_1 *
+                     Services.prompt.BUTTON_TITLE_CANCEL) +
+                    Services.prompt.BUTTON_POS_0_DEFAULT;
+
+  let rv = Services.prompt.confirmEx(window, promptTitle, promptMessage,
+                                     buttonFlags, restartText, null, null,
+                                     null, {});
+  if (rv != 0)
+    return;
+
+  let cancelQuit = Cc["@mozilla.org/supports-PRBool;1"]
+                     .createInstance(Ci.nsISupportsPRBool);
+  Services.obs.notifyObservers(cancelQuit, "quit-application-requested", "restart");
+
+  if (!cancelQuit.data) {
+    Services.startup.restartInSafeMode(Ci.nsIAppStartup.eAttemptQuit);
+  }
+}
+
+/* duplicateTabIn duplicates tab in a place specified by the parameter |where|.
+ *
+ * |where| can be:
+ *  "tab"         new tab
+ *  "tabshifted"  same as "tab" but in background if default is to select new
+ *                tabs, and vice versa
+ *  "window"      new window
+ *
+ * delta is the offset to the history entry that you want to load.
+ */
+function duplicateTabIn(aTab, where, delta) {
+  let newTab = SessionStore.duplicateTab(window, aTab, delta);
+
+  switch (where) {
+    case "window":
+      gBrowser.hideTab(newTab);
+      gBrowser.replaceTabWithWindow(newTab);
+      break;
+    case "tabshifted":
+      // A background tab has been opened, nothing else to do here.
+      break;
+    case "tab":
+      gBrowser.selectedTab = newTab;
+      break;
+  }
+}
+
+var Scratchpad = {
+  openScratchpad: function SP_openScratchpad() {
+    return this.ScratchpadManager.openScratchpad();
+  }
+};
+
+XPCOMUtils.defineLazyGetter(Scratchpad, "ScratchpadManager", function() {
+  let tmp = {};
+  Cu.import("resource:///modules/devtools/scratchpad-manager.jsm", tmp);
+  return tmp.ScratchpadManager;
+});
+
+var ResponsiveUI = {
+  toggle: function RUI_toggle() {
+    this.ResponsiveUIManager.toggle(window, gBrowser.selectedTab);
+  }
+};
+
+XPCOMUtils.defineLazyGetter(ResponsiveUI, "ResponsiveUIManager", function() {
+  let tmp = {};
+  Cu.import("resource:///modules/devtools/responsivedesign.jsm", tmp);
+  return tmp.ResponsiveUIManager;
+});
+
+function openEyedropper() {
+  var eyedropper = new this.Eyedropper(this);
+  eyedropper.open();
+}
+
+Object.defineProperty(this, "Eyedropper", {
+  get: function() {
+    let devtools = Cu.import("resource://gre/modules/devtools/Loader.jsm", {}).devtools;
+    return devtools.require("devtools/eyedropper/eyedropper").Eyedropper;
+  },
+  configurable: true,
+  enumerable: true
+});
+
+XPCOMUtils.defineLazyGetter(window, "gShowPageResizers", function () {
+#ifdef XP_WIN
+  // Only show resizers on Windows 2000 and XP
+  return parseFloat(Services.sysinfo.getProperty("version")) < 6;
+#else
+  return false;
+#endif
+});
+
+var MousePosTracker = {
+  _listeners: new Set(),
+  _x: 0,
+  _y: 0,
+  get _windowUtils() {
+    delete this._windowUtils;
+    return this._windowUtils = window.getInterface(Ci.nsIDOMWindowUtils);
+  },
+
+  addListener: function (listener) {
+    if (this._listeners.has(listener))
+      return;
+
+    listener._hover = false;
+    this._listeners.add(listener);
+
+    this._callListener(listener);
+  },
+
+  removeListener: function (listener) {
+    this._listeners.delete(listener);
+  },
+
+  handleEvent: function (event) {
+    var fullZoom = this._windowUtils.fullZoom;
+    this._x = event.screenX / fullZoom - window.mozInnerScreenX;
+    this._y = event.screenY / fullZoom - window.mozInnerScreenY;
+
+    this._listeners.forEach(function (listener) {
+      try {
+        this._callListener(listener);
+      } catch (e) {
+        Cu.reportError(e);
+      }
+    }, this);
+  },
+
+  _callListener: function (listener) {
+    let rect = listener.getMouseTargetRect();
+    let hover = this._x >= rect.left &&
+                this._x <= rect.right &&
+                this._y >= rect.top &&
+                this._y <= rect.bottom;
+
+    if (hover == listener._hover)
+      return;
+
+    listener._hover = hover;
+
+    if (hover) {
+      if (listener.onMouseEnter)
+        listener.onMouseEnter();
+    } else {
+      if (listener.onMouseLeave)
+        listener.onMouseLeave();
+    }
+  }
+};
+
+function focusNextFrame(event) {
+  let fm = Services.focus;
+  let dir = event.shiftKey ? fm.MOVEFOCUS_BACKWARDDOC : fm.MOVEFOCUS_FORWARDDOC;
+  let element = fm.moveFocus(window, null, dir, fm.FLAG_BYKEY);
+  if (element.ownerDocument == document)
+    focusAndSelectUrlBar();
+}
+let BrowserChromeTest = {
+  _cb: null,
+  _ready: false,
+  markAsReady: function () {
+    this._ready = true;
+    if (this._cb) {
+      this._cb();
+      this._cb = null;
+    }
+  },
+  runWhenReady: function (cb) {
+    if (this._ready)
+      cb();
+    else
+      this._cb = cb;
+  }
+};
+
+function BrowserOpenNewTabOrWindow(event) {
+  if (event.shiftKey) {
+    OpenBrowserWindow();
+  } else {
+    BrowserOpenTab();
+  }
+}
+
+let ToolbarIconColor = {
+  init: function () {
+    this._initialized = true;
+
+    window.addEventListener("activate", this);
+    window.addEventListener("deactivate", this);
+    Services.obs.addObserver(this, "lightweight-theme-styling-update", false);
+
+    // If the window isn't active now, we assume that it has never been active
+    // before and will soon become active such that inferFromText will be
+    // called from the initial activate event.
+    if (Services.focus.activeWindow == window)
+      this.inferFromText();
+  },
+
+  uninit: function () {
+    this._initialized = false;
+
+    window.removeEventListener("activate", this);
+    window.removeEventListener("deactivate", this);
+    Services.obs.removeObserver(this, "lightweight-theme-styling-update");
+  },
+
+  handleEvent: function (event) {
+    switch (event.type) {
+      case "activate":
+      case "deactivate":
+        this.inferFromText();
+        break;
+    }
+  },
+
+  observe: function (aSubject, aTopic, aData) {
+    switch (aTopic) {
+      case "lightweight-theme-styling-update":
+        // inferFromText needs to run after LightweightThemeConsumer.jsm's
+        // lightweight-theme-styling-update observer.
+        setTimeout(() => { this.inferFromText(); }, 0);
+        break;
+    }
+  },
+
+  inferFromText: function () {
+    if (!this._initialized)
+      return;
+
+    function parseRGB(aColorString) {
+      let rgb = aColorString.match(/^rgba?\((\d+), (\d+), (\d+)/);
+      rgb.shift();
+      return rgb.map(x => parseInt(x));
+    }
+
+    let toolbarSelector = "#navigator-toolbox > toolbar:not([collapsed=true]):not(#addon-bar)";
+#ifdef XP_MACOSX
+    toolbarSelector += ":not([type=menubar])";
+#endif
+
+    for (let toolbar of document.querySelectorAll(toolbarSelector)) {
+      let [r, g, b] = parseRGB(getComputedStyle(toolbar).color);
+      let luminance = 0.2125 * r + 0.7154 * g + 0.0721 * b;
+      if (luminance <= 110)
+        toolbar.removeAttribute("brighttext");
+      else
+        toolbar.setAttribute("brighttext", "true");
+    }
+  }
+}