var xhr = new XMLHttpRequest();
xhr.open(
  "GET",
  "http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.xhr.html",
  true
);
xhr.send();

fetch(
  "http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.fetch.html",
  { cache: "force-cache" }
);
var myRequest = new Request(
  "http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.worker.request.html"
);
fetch(myRequest, { cache: "force-cache" });

self.importScripts(
  "http://example.net/browser/browser/components/originattributes/test/browser/file_thirdPartyChild.import.js"
);