diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug626525.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug626525.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,150 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let prefsBranch;
+let currentActiveGroupItemId;
+
+function test() {
+  waitForExplicitFinish();
+
+  // disable the first run pref
+  prefsBranch = Services.prefs.getBranch("browser.panorama.");
+  prefsBranch.setBoolPref("experienced_first_run", false);
+
+  let win =
+    window.openDialog(getBrowserURL(), "_blank", "all,dialog=no", "about:blank");
+
+  let onLoad = function() {
+    win.removeEventListener("load", onLoad, false);
+
+    let theObserver = function(subject, topic, data) {
+      Services.obs.removeObserver(
+        theObserver, "browser-delayed-startup-finished");
+      test1(win);
+    }
+    Services.obs.addObserver(
+      theObserver, "browser-delayed-startup-finished", false);
+  };
+
+  win.addEventListener("load", onLoad, false);
+}
+
+// check whether tha menu is hidden when the "experienced_first_run" pref is
+// false
+function test1(win) {
+  is(win.gBrowser.tabs.length - win.gBrowser.visibleTabs.length, 0,
+     "There are no hidden tabs")
+
+  let originalTab = win.gBrowser.visibleTabs[0];
+
+  openTabContextPopup(win, originalTab);
+
+  ok(win.document.getElementById("context_tabViewMenu").hidden,
+     "The menu should be hidden");
+
+  closeTabContextPopup(win);
+
+  executeSoon(function() { 
+    ok(!win.TabView.getContentWindow(), "The tab view iframe is not loaded");
+    test2(win);
+  });
+}
+
+// press the next group key combination and check whether the iframe has loaded or not
+function test2(win) {
+  goToNextGroup(win);
+
+  // give it a delay so we can ensure the iframe has not been loaded
+  executeSoon(function() {
+    ok(!win.TabView.getContentWindow(),
+       "The tab view iframe is not loaded after pressing the next group key combination");
+
+    test3(win);
+  });
+}
+
+// first run has happened, open the tab context menupopup and the tabview menu,
+// move a tab to another group including iframe initialization.  Then,
+// use the key combination to change to the next group.
+function test3(win) {
+  prefsBranch.setBoolPref("experienced_first_run", true);
+
+  let newTab = win.gBrowser.addTab("about:blank");
+
+  // open the tab context menupopup and the tabview menupopup
+  openTabContextPopup(win, newTab);
+  win.document.getElementById("context_tabViewMenuPopup").openPopup(
+    win.document.getElementById("context_tabViewMenu"), "end_after", 0, 0,
+    true, false);
+
+  ok(!win.document.getElementById("context_tabViewMenu").hidden,
+     "The menu should be visible now");
+  is(win.gBrowser.tabs.length - win.gBrowser.visibleTabs.length, 0,
+     "There are no hidden tabs")
+  ok(!win.TabView.getContentWindow(),
+     "The tab view iframe is not loaded after opening tab context menu");
+
+  let onTabViewFrameInitialized = function() {
+     win.removeEventListener(
+       "tabviewframeinitialized", onTabViewFrameInitialized, false);
+
+     let contentWindow = win.document.getElementById("tab-view").contentWindow;
+
+     // show the tab view to ensure groups are created before checking.
+     let onTabViewShown = function() {
+       win.removeEventListener("tabviewshown", onTabViewShown, false);
+
+       ok(win.TabView.isVisible(), "Tab View is visible");
+
+       is(contentWindow.GroupItems.groupItems.length, 2,
+          "There are two group items");
+       is(contentWindow.GroupItems.groupItems[0].getChildren().length, 1,
+          "There should be one tab item in the first group");
+       is(contentWindow.GroupItems.groupItems[1].getChildren().length, 1,
+          "There should be one tab item in the second group");
+
+       // simulate the next group key combination
+       currentActiveGroupItemId =
+         contentWindow.GroupItems.getActiveGroupItem().id;
+
+       win.addEventListener("tabviewhidden", onTabViewHidden, false);
+
+       win.TabView.toggle();
+     };
+     let onTabViewHidden = function() {
+       win.removeEventListener("tabviewhidden", onTabViewHidden, false);
+
+       goToNextGroup(win);
+
+       isnot(contentWindow.GroupItems.getActiveGroupItem().id,
+             currentActiveGroupItemId, "Just switched to another group");
+
+       // close the window and finish it
+       win.close();
+       finish();
+     };
+     win.addEventListener("tabviewshown", onTabViewShown, false);
+     // give it a delay to ensure everything is loaded.
+     executeSoon(function() { win.TabView.toggle(); });
+  };
+  win.addEventListener(
+    "tabviewframeinitialized", onTabViewFrameInitialized, false);
+  // move the tab to another group using the menu item
+  win.document.getElementById("context_tabViewNewGroup").doCommand();
+
+  // close popups
+  win.document.getElementById("context_tabViewMenuPopup").hidePopup();
+  closeTabContextPopup(win);
+}
+
+function openTabContextPopup(win, tab) {
+  var evt = new Event("");
+  tab.dispatchEvent(evt);
+  win.document.getElementById("tabContextMenu").openPopup(
+    tab, "end_after", 0, 0, true, false, evt);
+}
+
+function closeTabContextPopup(win) {
+  win.document.getElementById("tabContextMenu").hidePopup();
+}
+