Debian

Debian Testing, Installation Iceweasel(Firefox Fork) Browser From Unstable

Community is doing great job supporting and contributing to Debian, guys are making as-stable-as-possible product for server installs. (Actually, I have never seen live production server running Debian, lol, but I think it should work well)

But if you’re using Debian on local box, as me, you can find it a bit too stable: at the moment Iceweasel 10.0.12 is in stable repo, 17.0.9 in testing, 24 in unstable.