diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug598375.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug598375.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  waitForExplicitFinish();
+
+  newWindowWithTabView(function (win) {
+    registerCleanupFunction(function () win.close());
+
+    let cw = win.TabView.getContentWindow();
+    let groupItem = cw.GroupItems.groupItems[0];
+    groupItem.setBounds(new cw.Rect(cw.innerWidth - 200, 0, 200, 200));
+
+    whenTabViewIsHidden(function () waitForFocus(finish), win);
+
+    waitForFocus(function () {
+      let button = cw.document.getElementById("exit-button");
+      EventUtils.synthesizeMouseAtCenter(button, {}, cw);
+    }, cw);
+  });
+}