The Mozilla developers have just released Firefox 3.6.3, an update to the latest version of the Firefox web browser. This update fixes a critical security vulnerability in Firefox 3.6.2 making it a recommended update for all uses who have that version of the web browser installed. The exploit is only affecting Firefox 3.6 versions which means that users who are still running Firefox 3.6 or Firefox 3.6.1 should also updatetheir version to the latest immediately. 
Mozilla Firefox 3.6 – Faster, more secure, easier to use and sporting a new look, this latest Firefox release sets a new standard for web browser innovation. Mozilla  Firefox project is a redesign of Mozilla’s browser component, written using the XUL user interface language and designed to be cross-platform. It is small, fast and easy to use, and offers many advantages over other web browsers, such as the tabbed browsing and the ability to block pop-up windows