Critical security holes closed in Firefox 16 and Thunderbird 16 | 21st Century Learning and Teaching | Scoop.it
Mozilla has released a security update to Firefox, Thunderbird, and their ESR versions, and Seamonkey after critical security flaws were found which exposed users to XSS attacks...

 

                               ===> UPDATE asap!!! <====

 

Read more, a MUST:

http://www.h-online.com/open/news/item/Critical-security-holes-closed-in-Firefox-16-and-Thunderbird-16-1737891.html