Mozilla has released several securities updates. If you use one of these products then review these security advisories and apply appropriate updates.
Firefox 2: 2.0.0.18
See http://www.mozilla.org/security/known-vuln.../firefox20.html
Download from: http://www.mozilla.com/en-US/firefox/all-older.html
Firefox 3: 3.0.4
See http://www.mozilla.org/security/known-vuln.../firefox30.html
Download from http://www.mozilla.com/firefox/
SeaMonkey : 1.1.13
See http://www.mozilla.org/security/known-vuln...eamonkey11.html
Download from http://www.seamonkey-project.org/