The Tor Browser / file revision

   SimpleTest.waitForExplicitFinish();

   function frameLoaded() {

     var testframe = document.getElementById('testframe');

     var embed = document.getElementsByTagName('embed')[0];

     if (undefined === embed)

       embed = document.getElementsByTagName('object')[0];

     // In the file:// URI case, this ends up being cross-origin.

     // Skip these checks in that case.

     if (testframe.contentDocument) {

       var content = testframe.contentDocument.body.innerHTML;

       if (!content.length)

         return;

       var filename = embed.getAttribute("src") ||

           embed.getAttribute("geturl") ||

           embed.getAttribute("geturlnotify") ||

           embed.getAttribute("data");

       var req = new XMLHttpRequest();

       req.open('GET', filename, false);

       req.overrideMimeType('text/plain; charset=x-user-defined');

       req.send(null);

       is(req.status, 200, "bad XMLHttpRequest status");

       is(content, req.responseText.replace(/\r\n/g, "\n"),

          "content doesn't match");

     }

     is(embed.getError(), "pass", "plugin reported error");

     SimpleTest.finish();

   }