Thanks! Please check your inbox to confirm your subscription. If you haven’t previously confirmed a subscription to a Mozilla-related newsletter you may have to do so. Please check your inbox or your spam filter for an email from us. Matt Ranney This sounds like a pretty serious issue. Shouldn’t you also disable Java and Flash as well? December 8th, 2010 at 18:00 John Haugeland No. Flash and Java,
![WebSocket disabled in Firefox 4 – Mozilla Hacks - the Web developer blog](https://cdn-ak-scissors.b.st-hatena.com/image/square/8f043099b608abf8384b24171faa177d3698e62e/height=288;version=1;width=512/https%3A%2F%2Fhacks.mozilla.org%2Fwp-content%2Fthemes%2FHax%2Fimg%2Fhacks-meta-image.jpg)