New versions of Mozilla Firefox (3.6.14 and 3.5.17) were released on March 1. Please see mozilla.net for downloads
An update was released for Adobe Flash on March 1. The updated version is 10.2.152.32. It can be downloaded from get.adobe.com/flashplayer
Update
Another update was issued for Firefox over the weekend. Version 3.6.15 is now the most current.