For those of you who want 'firefox' to run 3.5 with your current 3.0 profile, you can do the following: tar xjvf firefox-3.5.tar.bz2 sudo mv ./firefox /usr

For those of you who want 'firefox' to run 3.5 with your current 3.0 profile, you can do the following: tar xjvf firefox-3.5.tar.bz2 sudo mv ./firefox /usr/lib/firefox-3.5 cd /usr/bin sudo ln -s /usr/lib/firefox-3.5/firefox firefox-3.5 sudo rm -f firefox sudo ln -s firefox-3.5 firefox You can run 3.0 by using 'firefox-3.0', which should already exist.