A few weeks back I published a post about the awesome new technology that is WebSockets and a great WebSocket wrapper called Socket.IO. The HTML5 WebSocket API provides socket connection support for faster messaging between client and server. Consider WebSocket an optimized AJAX solution. SocketIO provides both server and client side solutions to use WebSocket. WebSocket is a great match for Comet technologies (GChat, Facebook Chat, etc.). Unfortunately it looks as though WebSocket revolution will need to be put on hold.
Bug 616733 in Mozilla bug tracker details Mozilla's plans to disable WebSocket in Firefox 4, enabled only by updating a pref setting. A Geolocation-style Firefox prompt was proposed but did not gain support. The reason for disabling WebSocket is a Google report detailing security issues with the current WebSocket protocol. That report is available here. Apple was recently known to be considering disabling WebSocket in Safari as well.
While WebSocket being disabled is a blow, web security grows increasingly important. Hopefully a new WebSocket protocol draft is soon released so we can unleash the power of WebSocket!