The Tor Browser / file revision

 Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");

 const Cc = Components.classes;

 const Ci = Components.interfaces;

 function run_test() {

   let manifest = do_get_file('testcompnoaslr.manifest');

   Components.manager.autoRegister(manifest);

   var sysInfo = Cc["@mozilla.org/system-info;1"].

                 getService(Ci.nsIPropertyBag2);

   var ver = parseFloat(sysInfo.getProperty("version"));

   if (ver < 6.0) {

     // This is disabled on pre-Vista OSs.

     do_check_true("{335fb596-e52d-418f-b01c-1bf16ce5e7e4}" in Components.classesByID);

   } else {

     do_check_false("{335fb596-e52d-418f-b01c-1bf16ce5e7e4}" in Components.classesByID);

   }

 }