Bug 608589 - Report error and manually remove tab when closing animation doesn't finish. r=gavin a=b

browser/base/content/tabbrowser.xml

@@ -1455,6 +1455,13 @@
 
             this._blurTab(aTab);
             aTab.removeAttribute("fadein");
+
+            setTimeout(function (tab, tabbrowser) {
+              if (tab.parentNode) {
+                NS_ASSERT(false, "Giving up waiting for the tab closing animation to finish (bug 608589)");
+                tabbrowser._endRemoveTab(tab);
+              }
+            }, 2000, aTab, this);
           ]]>
         </body>
       </method>