diff -r 000000000000 -r 6474c204b198 browser/components/tabview/test/browser_tabview_bug685476.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/components/tabview/test/browser_tabview_bug685476.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,26 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function test() {
+  waitForExplicitFinish();
+
+  showTabView(function () {
+    let tab = gBrowser.addTab();
+    registerCleanupFunction(function () gBrowser.removeTab(tab));
+
+    let cw = TabView.getContentWindow();
+    whenAppTabIconAdded(cw.GroupItems.groupItems[0], function() {
+      let body = cw.document.body;
+      let [appTabIcon] = cw.iQ(".appTabTray .appTabIcon");
+
+      EventUtils.synthesizeMouseAtCenter(appTabIcon, {type: "mousedown"}, cw);
+      EventUtils.synthesizeMouse(body, 500, 100, {type: "mousemove"}, cw);
+      EventUtils.synthesizeMouse(body, 500, 100, {type: "mouseup"}, cw);
+
+      ok(TabView.isVisible(), "tabview is still visible");
+
+      hideTabView(finish);
+    });
+    gBrowser.pinTab(tab);
+  });
+}