Download Mozilla Firefox Aurora 6 and Firefox 7 Nightly Build – Current version of Firefox I’m using is Firefox v4.x. Surprisingly, Mozilla has managed to release newer versions: Firefox 6 and Firefox 7 which are now still in beta stage. Surprisingly, Firefox 6 is now in Aurora channel which means still in development but has most stability than the nightly build. Adventurous users can also grab Firefox 7 which is in nightly build.
Mozilla Firefox 6 and 7 are both available for Windows, Mac OS X, and Linux.
Download Firefox 6 Aurora
Download Firefox 7 Nightly
Some Direct Links:
Firefox 7 Nightly Linux Intel 32-bit
Firefox 6 Aurora Windows 32-bit / x86
Firefox 7 Nightly Windows 32-bit / x86
Firefox 7 Nightly Apple Mac OS X