Firefox 3.6.4 has been released, this version address 7 vulnerabilities which range from critical issues such as denial of service or arbitrary code execution bugs along with a few lower level issues. Below is list of critical vulnerabilities fixed in this version
For full list of fixed vulnerabilities click here.
In this version they have also improved the handling of plugin crashes, now if a plugin crash or freez while visiting or browsing a website it will now crash the plugin without killing the browser (process end). User and reader if you have not update visit below link to download.