The Tor Browser / file revision

 /* Any copyright is dedicated to the Public Domain.

  * http://creativecommons.org/publicdomain/zero/1.0/

  */

 function test() {

   waitForExplicitFinish();

   gBrowser.selectedTab = gBrowser.addTab();

   // Open a html page with about:certerror in an iframe

   window.content.addEventListener("load", testIframeCert, true);

   content.location = "data:text/html,<iframe width='700' height='700' src='about:certerror'></iframe>";

 }

 function testIframeCert() {

   window.content.removeEventListener("load", testIframeCert, true);

   // Confirm that the expert section is hidden

   var doc = gBrowser.contentDocument.getElementsByTagName('iframe')[0].contentDocument;

   var eC = doc.getElementById("expertContent");

   ok(eC, "Expert content should exist")

   ok(eC.hasAttribute("hidden"), "Expert content should be hidded by default");

   // Clean up

   gBrowser.removeCurrentTab();

   finish();

 }