diff -r 000000000000 -r 6474c204b198 browser/base/content/test/newtab/browser_newtab_bug998387.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/newtab/browser_newtab_bug998387.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,25 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+function runTests() {
+  yield setLinks("0");
+  yield addNewTabPageTab();
+
+  // Remember if the click handler was triggered
+  let {site} = getCell(0);
+  let origOnClick = site.onClick;
+  let clicked = false;
+  site.onClick = e => {
+    origOnClick.call(site, e);
+    clicked = true;
+    executeSoon(TestRunner.next);
+  };
+
+  // Send a middle-click and make sure it happened
+  let block = getContentDocument().querySelector(".newtab-control-block");
+  yield EventUtils.synthesizeMouseAtCenter(block, {button: 1}, getContentWindow());
+  ok(clicked, "middle click triggered click listener");
+
+  // Make sure the cell didn't actually get blocked
+  checkGrid("0");
+}