diff -r 000000000000 -r 6474c204b198 dom/browser-element/mochitest/browserElement_ErrorSecurity.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/browser-element/mochitest/browserElement_ErrorSecurity.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,58 @@
+/* Any copyright is dedicated to the public domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Bug 764718 - Test that mozbrowsererror works for a security error.
+
+"use strict";
+
+SimpleTest.waitForExplicitFinish();
+browserElementTestHelpers.setEnabledPref(true);
+browserElementTestHelpers.addPermission();
+
+var iframe = null;
+function runTest() {
+  iframe = document.createElement('iframe');
+  SpecialPowers.wrap(iframe).mozbrowser = true;
+  document.body.appendChild(iframe);
+
+  checkForGenericError();
+}
+
+function checkForGenericError() {
+  iframe.addEventListener("mozbrowsererror", function onGenericError(e) {
+    iframe.removeEventListener(e.type, onGenericError);
+    ok(true, "Got mozbrowsererror event.");
+    ok(e.detail.type == "other", "Event's detail has a |type| param with the value '" + e.detail.type + "'.");
+
+    checkForExpiredCertificateError();
+  });
+
+  iframe.src = "http://this_is_not_a_domain.example.com";
+}
+
+function checkForExpiredCertificateError() {
+  iframe.addEventListener("mozbrowsererror", function onCertError(e) {
+    iframe.removeEventListener(e.type, onCertError);
+    ok(true, "Got mozbrowsererror event.");
+    ok(e.detail.type == "certerror", "Event's detail has a |type| param with the value '" + e.detail.type + "'.");
+
+    checkForNoCertificateError();
+  });
+
+  iframe.src = "https://expired.example.com";
+}
+
+
+function checkForNoCertificateError() {
+  iframe.addEventListener("mozbrowsererror", function onCertError(e) {
+    iframe.removeEventListener(e.type, onCertError);
+    ok(true, "Got mozbrowsererror event.");
+    ok(e.detail.type == "certerror", "Event's detail has a |type| param with the value '" + e.detail.type + "'.");
+
+    SimpleTest.finish();
+  });
+
+  iframe.src = "https://nocert.example.com";
+}
+
+addEventListener('testready', runTest);