Mozilla has announced the Firefox 3.6.4 browser and it has an increased amount of security and stability. The new Firefox browser has crash protection for Windows and Linux users as it isolates third party plugins when they crash.
Firefox has a tendency to crash when watching videos or playing games. If a video or game is causing Firefox to crash, an error message will appear and will not cause the user to force quit the browser or quit on its own. Crash protection with work on Adobe Flash, Apple Quicktime, and Microsoft Silverlight for Windows and Linux computers. [Mozilla Blog]