Firefox 5 Released

https://www.mozilla.com/en-US/firefox/5.0/releasenotes/

"Mozilla released the latest version of their browser, Firefox 5. With
the update comes a host of new features and also addresses a number
of security vulnerabilities[1]. Firefox 3.6.x will remain in support
for 'a short amount of time'. Anyone still using Firefox 3 are
recommended to upgrade to Firefox 4.x or later to continue receiving
security updates."