<!DOCTYPE html> <html class="reftest-wait"> <meta charset=UTF-8> <script>"use strict"; (function(){ var req = new XMLHttpRequest(); req.open('GET', '?' + Date.now()); req.responseType = 'moz-blob'; var b = null; req.onprogress = function(e) { b = req.response; }; req.onreadystatechange = function(e) { if (req.readyState == 3) { req.abort(); } if (req.readyState == 4) { document.documentElement.removeAttribute('class'); } }; req.send(); })(); </script>