Mozilla released new build of Firefox v3 with security fixes. Issued 9 Security Advisories
The release notes for the new build of Firefox v3.0.11 includes security fixes in addition to stability and other fixes:
What’s New in Firefox 3.0.11
Firefox 3.0.11 fixes several issues found in Firefox 3.0.10:
Fixed several security issues.
Fixed several stability issues.
Several issues were reported with the internal database, SQLite, which have now been fixed by upgrading to a newer version.
Fixed an issue where, in some specific cases, the bookmarks database would become corrupt. (bug 464486)
http://www.mozilla.com/en-US/firefox/3.0.11/releasenotes/
You can download it now from their website or FTP server if you want to take advantage of the fixes (especially the security fixes) or use the updater.

Mozilla Security Advisories:
- MFSA 2009-32 JavaScript chrome privilege escalation
- MFSA 2009-31 XUL scripts bypass content-policy checks
- MFSA 2009-30 Incorrect principal set for file: resources loaded via location bar
- MFSA 2009-29 Arbitrary code execution using event listeners attached to an element whose owner document is null
- MFSA 2009-28 Race condition while accessing the private data of a NPObject JS wrapper class object
- MFSA 2009-27 SSL tampering via non-200 responses to proxy CONNECT requests
- MFSA 2009-26 Arbitrary domain cookie access by local file: resources
- MFSA 2009-25 URL spoofing with invalid unicode characters
- MFSA 2009-24 Crashes with evidence of memory corruption (rv:1.9.0.11)