Mozilla has released Firefox 3.6.4 Beta (Build 7) which fixed several security and stability issues found in previous versions of Firefox 3.6.It is recommended for Firefox 3.6.4 Beta users to update their browser to latest version.
Firefox 3.6.4 provides uninterrupted browsing for Windows and Linux users when there is a crash in the Adobe Flash , Microsoft Silverlight and Apple Quicktime plugins.
If a plug-in crashes it will not affect the rest of Firefox user can able to reload the page to restart the plug-in and try again.
For more details read Firefox 3.6.4 Beta (Build 7) release notes