The Tor Browser / file revision

 function test() {

   waitForExplicitFinish(); 

   var newTab;

   var newBrowser;

   const secMan = Cc["@mozilla.org/scriptsecuritymanager;1"].getService(Ci.nsIScriptSecurityManager);

   var iteration = 1;

   const uris = [undefined, "about:blank"];

   var uri;

   function testLoad(event) {

     newBrowser.removeEventListener("load", testLoad, true);

     is (event.target, newBrowser.contentDocument, "Unexpected target");

     var prin = newBrowser.contentDocument.nodePrincipal;

     isnot(prin, null, "Loaded principal must not be null when adding " + uri);

     isnot(prin, undefined, "Loaded principal must not be undefined when loading " + uri);

     is(secMan.isSystemPrincipal(prin), false,

        "Loaded principal must not be system when loading " + uri);

     gBrowser.removeTab(newTab);

     if (iteration == uris.length) {

       finish();

     } else {

       ++iteration;

       doTest();

     }

   }

   function doTest() {

     uri = uris[iteration - 1];

     newTab = gBrowser.addTab(uri);

     newBrowser = gBrowser.getBrowserForTab(newTab);

     newBrowser.addEventListener("load", testLoad, true);

     var prin = newBrowser.contentDocument.nodePrincipal;

     isnot(prin, null, "Forced principal must not be null when loading " + uri);

     isnot(prin, undefined,

           "Forced principal must not be undefined when loading " + uri);

     is(secMan.isSystemPrincipal(prin), false,

        "Forced principal must not be system when loading " + uri);

    }

    doTest();

 }