diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug604098.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug604098.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,41 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let contentWindow;
+let contentElement;
+
+function test() {
+  waitForExplicitFinish();
+
+  registerCleanupFunction(function() {
+    if (gBrowser.tabs.length > 1)
+      gBrowser.removeTab(gBrowser.tabs[1]);
+    hideTabView();
+  });
+
+  showTabView(function() {
+    contentWindow = TabView.getContentWindow();
+    contentElement = contentWindow.document.getElementById("content");
+    test1();
+  });
+}
+
+function test1() {
+  let groupItems = contentWindow.GroupItems.groupItems;
+  is(groupItems.length, 1, "there is one groupItem");
+
+  whenTabViewIsHidden(function() {
+    gBrowser.selectedTab = gBrowser.tabs[0];
+    is(groupItems.length, 2, "there are two groupItems");
+    closeGroupItem(groupItems[1], finish);
+  });
+
+  // double click
+  doubleClick(contentElement, 0);
+}
+
+function doubleClick(targetElement, buttonCode) {
+  EventUtils.sendMouseEvent(
+    { type: "dblclick", button: buttonCode }, targetElement, contentWindow);
+}
+