Is there a PPA or repo that always contains the absolute latest version of stable, non-beta, Firefox for any general Debian/.deb based distros? Ubuntu, Crunchbang, Trisquel, that sort?

I'm tired of any of my systems getting left behind with older versions of Firefox because I don't feel that I should have to upgrade the whole OS to get one program.

I've only been able to find a PPA for Firefox Beta: https://launchpad.net/~mozillateam/+archive/firefox-next
And even when I added that to my older Ubuntu system it would still return that message the the currently installed version of Firefox is the latest one. Which it is not since I'm still on version 11 here.

Help, please?