diff -r 000000000000 -r 6474c204b198 browser/base/content/test/newtab/browser_newtab_bug734043.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/newtab/browser_newtab_bug734043.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function runTests() {
+  yield setLinks("0,1,2,3,4,5,6,7,8");
+  setPinnedLinks("");
+
+  yield addNewTabPageTab();
+  checkGrid("0,1,2,3,4,5,6,7,8");
+
+  let receivedError = false;
+  let block = getContentDocument().querySelector(".newtab-control-block");
+
+  function onError() {
+    receivedError = true;
+  }
+
+  let cw = getContentWindow();
+  cw.addEventListener("error", onError);
+
+  for (let i = 0; i < 3; i++)
+    EventUtils.synthesizeMouseAtCenter(block, {}, cw);
+
+  yield whenPagesUpdated();
+  ok(!receivedError, "we got here without any errors");
+  cw.removeEventListener("error", onError);
+}