As mentioned by Chris Coulson (chrisccoulson), since Firefox 16.0.1 has already been published it is better to update once version 16.0.1 is in the Ubuntu repos. There was a reason why 16.0 prompted Mozilla to take it down from their main website. Synaptic can choose an older version by "Force Version..." http://www.howtogeek.com/117929/how-to-downgrade- packages-on-ubuntu/
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/1065586 Title: Downgrade from Firefox 16 to 15.0.1 Status in “firefox” package in Ubuntu: Invalid Bug description: Hi, I suggest downgrading Firefox in the repository from Firefox 16 to 15.0.1, because of a critical security vulnerability. Firefox 16.0+build1-0ubuntu0.12.04.1 is still in the repository as of writing this bug report. Workaround: download Firefox 15.0.1 manually from: http://www.mozilla.org/ See also: Security Vulnerability in Firefox 16 http://blog.mozilla.org/security/2012/10/10/security-vulnerability-in- firefox-16/ To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1065586/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

