Mozilla has released Firefox version 3.5.6, which includes 62
fixes, three of which are critical security updates.
Firefox is set to automatically download updates and prompt you
to install them, but I know that some colleagues of mine have
reported instances of the auto-update failing, probably due to
system security settings. If you're a Firefox user and you aren't
prompted to update your browser today, go to the Help menu and
click "Check for Updates" to download the latest version
In addition to the security updates, Mozilla has provided
patches to common functional problems, such as with Firefox's full
screen mode. For the full list of patches in the 3.5.6 update, click here.