The Tor Browser / file revision

 /**

  * Any copyright is dedicated to the Public Domain.

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

  */

 const importSubURL = "relativeLoad_sub_import.js";

 onmessage = function(event) {

   var xhr = new XMLHttpRequest();

   xhr.open("GET", "testXHR.txt", false);

   xhr.send(null);

   if (xhr.status != 404) {

     throw "Loaded an xhr from the wrong location!";

   }

   importScripts(importSubURL);

   var worker = new Worker("relativeLoad_sub_worker2.js");

   worker.onerror = function(event) {

     throw event.data;

   };

   worker.onmessage = function(event) {

     if (event.data != workerSubURL) {

       throw "Bad data!";

     }

     postMessage(workerSubURL);

   };

 };