mozilla-release/testing/web-platform/tests/resource-timing/resources/iframe_TAO_multi_wildcard.html

<body>
<script>
function dirname(path) {
    return path.replace(/\/[^\/]*$/, '/');
}

function request() {
  var dirName = dirname(location.href);
  // create a cross-origin request
  var url = dirName.replace('://', '://www.') + 'TAOResponse.py?tao=multi_wildcard';
  var img = new Image();
  img.crossOrigin = "anonymous";
  img.src = url;
}

if(window.parent.setup_iframe) {
  window.parent.setup_iframe();
  request();
}
</script>
</body>