diff -r 000000000000 -r 6474c204b198 dom/browser-element/mochitest/browserElement_CloseFromOpener.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/browser-element/mochitest/browserElement_CloseFromOpener.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,33 @@
+/* Any copyright is dedicated to the public domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Bug 764718 - Test that window.close() works from the opener window.
+"use strict";
+
+SimpleTest.waitForExplicitFinish();
+browserElementTestHelpers.setEnabledPref(true);
+browserElementTestHelpers.addPermission();
+
+function runTest() {
+  var iframe = document.createElement('iframe');
+  SpecialPowers.wrap(iframe).mozbrowser = true;
+
+  iframe.addEventListener('mozbrowseropenwindow', function(e) {
+    ok(true, "got openwindow event.");
+    document.body.appendChild(e.detail.frameElement);
+
+    e.detail.frameElement.addEventListener("mozbrowserclose", function(e) {
+      ok(true, "got mozbrowserclose event.");
+      SimpleTest.finish();
+    });
+  });
+
+
+  document.body.appendChild(iframe);
+
+  // file_browserElement_CloseFromOpener opens a new window and then calls
+  // close() on it.
+  iframe.src = "file_browserElement_CloseFromOpener.html";
+}
+
+addEventListener('testready', runTest);