I found this how-to very useful as I use Flock as my primary browser in Ubuntu...Most Firefox extensions work with Flock. Once you remove all the 'social' crap, you are basically left with a faster Firefox IMO:
http://ubuntuforums.org/showthread.php?t=268273&highlight=install+flock+browser
Installing Flock web browser in Ubuntu
Discussion in 'Linux Compatibility and Software' started by theZoid, Jan 27, 2008.