The Tor Browser / file revision

 /* Any copyright is dedicated to the Public Domain.

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

  */

 function test () {

   waitForExplicitFinish();

   var firstLocation = "http://example.org/browser/browser/base/content/test/general/dummy_page.html";

   gBrowser.selectedTab = gBrowser.addTab(firstLocation);

   gBrowser.selectedBrowser.addEventListener("pageshow", function onPageShow1() {

     gBrowser.selectedBrowser.removeEventListener("pageshow", onPageShow1);

     gBrowser.selectedBrowser.contentWindow.history.pushState("page2", "page2", "page2");

     window.maximize();

     // Find where the nav-bar is vertically.

     var navBar = document.getElementById("nav-bar");

     var boundingRect = navBar.getBoundingClientRect();

     var yPixel = boundingRect.top + Math.floor(boundingRect.height / 2);

     var xPixel = 0; // Use the first pixel of the screen since it is maximized.

     gBrowser.selectedBrowser.contentWindow.addEventListener("popstate", function onPopState() {

       gBrowser.selectedBrowser.contentWindow.removeEventListener("popstate", onPopState);

       is(gBrowser.selectedBrowser.contentDocument.location.href, firstLocation,

          "Clicking the first pixel should have navigated back.");

       window.restore();

       gBrowser.removeCurrentTab();

       finish();

     });

     EventUtils.synthesizeMouseAtPoint(xPixel, yPixel, {}, window);

   });

 }