diff -r 000000000000 -r 6474c204b198 addon-sdk/source/lib/sdk/addon-page.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/addon-sdk/source/lib/sdk/addon-page.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,73 @@
+/* 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/. */
+'use strict';
+
+module.metadata = {
+  'stability': 'deprecated'
+};
+
+const { WindowTracker } = require('./deprecated/window-utils');
+const { isXULBrowser } = require('./window/utils');
+const { add, remove } = require('./util/array');
+const { getTabs, closeTab, getURI } = require('./tabs/utils');
+const { data } = require('./self');
+const { ns } = require("./core/namespace");
+
+const addonURL = data.url('index.html');
+
+const windows = ns();
+
+require("./util/deprecate").deprecateUsage(
+  "The addon-page module is deprecated." +
+  "In the new Firefox UI design all pages will include navigational elements;" +
+  "once the new design ships, using the addon-page module will not have any effect."
+);
+
+WindowTracker({
+  onTrack: function onTrack(window) {
+    if (!isXULBrowser(window) || windows(window).hideChromeForLocation)
+      return;
+
+    let { XULBrowserWindow } = window;
+    let { hideChromeForLocation } = XULBrowserWindow;
+
+    windows(window).hideChromeForLocation = hideChromeForLocation;
+
+    // Augmenting the behavior of `hideChromeForLocation` method, as
+    // suggested by https://developer.mozilla.org/en-US/docs/Hiding_browser_chrome
+    XULBrowserWindow.hideChromeForLocation = function(url) {
+      return isAddonURL(url) || hideChromeForLocation.call(this, url);
+    }
+  },
+
+  onUntrack: function onUntrack(window) {
+    if (isXULBrowser(window))
+      getTabs(window).filter(tabFilter).forEach(untrackTab.bind(null, window));
+  }
+});
+
+function isAddonURL(url) {
+  if (url.indexOf(addonURL) === 0) {
+    let rest = url.substr(addonURL.length);
+    return ((rest.length === 0) || (['#','?'].indexOf(rest.charAt(0)) > -1));
+  }
+  return false;
+}
+
+function tabFilter(tab) {
+  return isAddonURL(getURI(tab));
+}
+
+function untrackTab(window, tab) {
+  // Note: `onUntrack` will be called for all windows on add-on unloads,
+  // so we want to clean them up from these URLs.
+  let { hideChromeForLocation } = windows(window);
+
+  if (hideChromeForLocation) {
+    window.XULBrowserWindow.hideChromeForLocation = hideChromeForLocation.bind(window.XULBrowserWindow);
+    windows(window).hideChromeForLocation = null;
+  }
+
+  closeTab(tab);
+}