User Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:23.0) Gecko/20100101 Firefox/23.0 (Beta/Release) Build ID: 20130718163513 Steps to reproduce: go to runescape.com/beta log in to the html 5 beta (NIS) Actual results: This Error_game_html5 - Your browser doesn't support all the features required by RuneScape. RuneScape uses a number of cutting-edge browser technologies, unfortunately it appears your browser doesn't support the following features: Web Sockets on Web Workers There are a few simple solutions to this problem: 1. Download an up-to-date web browser. We recommend Google's Chrome browser. 2. If you have Java installed, use our Java web client instead of the HTML5 one. 3. Install our downloadable Java client. If problems persist, please refer to the Technical FAQs, which can be found in the Customer Support section of our website. Expected results: HTML5 Client should load

This is the only thing that stops runescape html5 beta from working