diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug627736.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug627736.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,61 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  waitForExplicitFinish();
+  newWindowWithTabView(onTabViewWindowLoaded);
+}
+
+function onTabViewWindowLoaded(win) {
+  ok(win.TabView.isVisible(), "Tab View is visible");
+
+  let contentWindow = win.document.getElementById("tab-view").contentWindow;
+  let [originalTab] = win.gBrowser.visibleTabs;
+  let originalGroup = contentWindow.GroupItems.getActiveGroupItem();
+
+  // open a group with a tab, and close either the group or the tab.
+  function openAndClose(groupOrTab, callback) {
+    // let's create a group with a tab.
+    let group = new contentWindow.GroupItem([], {
+      immediately: true,
+      bounds: {left: 20, top: 20, width: 400, height: 400}
+    });
+    contentWindow.UI.setActive(group);
+    win.gBrowser.loadOneTab('about:blank', {inBackground: true});
+  
+    is(group.getChildren().length, 1, "The group has one child now.");
+    let tab = group.getChild(0);
+  
+    function check() {
+      if (groupOrTab == 'group') {
+        group.removeSubscriber("groupHidden", check);
+        group.closeHidden();
+      } else
+        tab.removeSubscriber("tabRemoved", check);
+  
+      is(contentWindow.GroupItems.getActiveGroupItem(), originalGroup,
+        "The original group is active.");
+      is(contentWindow.UI.getActiveTab(), originalTab._tabViewTabItem,
+        "The original tab is active");
+  
+      callback();
+    }
+  
+    if (groupOrTab == 'group') {
+      group.addSubscriber("groupHidden", check);
+      group.closeAll();
+    } else {
+      tab.addSubscriber("tabRemoved", check);
+      tab.close();
+    }
+  }
+
+  // PHASE 1: create a group with a tab and close the group.
+  openAndClose("group", function postPhase1() {
+    // PHASE 2: create a group with a tab and close the tab.
+    openAndClose("tab", function postPhase2() {
+      win.close();
+      finish();
+    });
+  });
+}