Mozilla fixes security issues in Firefox 3.5.3 by releasing a small security package that updates Firefox 3.5.3 to Firefox 3.5.4. This release also fixes several stability issues in Firefox 3.5.3.
Ubuntu users will soon be prompted for an update, but they can still lay their hands on a safer Firefox by downloading Firefox 3.5.4 from Mozilla’s website. For a complete list of changes in this version see the changelog
Recently released Seamonkey 2.0 already includes this security update package. It’s browser’s back-bone is a Firefox 3.5.4.