diff -r 000000000000 -r 6474c204b198 security/manager/ssl/tests/mochitest/browser/browser_certViewer.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/manager/ssl/tests/mochitest/browser/browser_certViewer.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,40 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+let gBugWindow;
+
+function onLoad() {
+  gBugWindow.removeEventListener("load", onLoad);
+  gBugWindow.addEventListener("unload", onUnload);
+  gBugWindow.close();
+}
+
+function onUnload() {
+  gBugWindow.removeEventListener("unload", onUnload);
+  window.focus();
+  finish();
+}
+
+// This test opens and then closes the certificate viewer to test that it
+// does not cause assertion failures.
+function test() {
+  waitForExplicitFinish();
+  let certCache = Cc["@mozilla.org/security/nsscertcache;1"]
+                    .getService(Ci.nsINSSCertCache);
+  certCache.cacheAllCerts();
+  let certList = certCache.getX509CachedCerts();
+  let enumerator = certList.getEnumerator();
+  ok(enumerator.hasMoreElements(), "we have at least one certificate");
+  let cert = enumerator.getNext().QueryInterface(Ci.nsIX509Cert);
+  ok(cert, "found a certificate to look at");
+  info("looking at certificate with nickname " + cert.nickname);
+  let arg = {
+    QueryInterface: function() this,
+    getISupportAtIndex: function() this.cert,
+    cert: cert
+  };
+  gBugWindow = window.openDialog("chrome://pippki/content/certViewer.xul",
+                                 "", "", arg);
+  gBugWindow.addEventListener("load", onLoad);
+}