No, I not really want to compile Firefox from source, and I don't want to add any untrusted 3rd party repositories. Google tells me there aren't any solution for having a fresh version of Firefox on Scientific-Linux 6.1. Or are there any methods?
I am using firefox 9 on scientific linux without any headaches. Here is how:
Firefox does not require you to compile it. Just run binary and you are good to go. Since everything is there in /opt/firefox or whatever directory you choose, you system's environment is not messed up. All you need to do, if you want to uninstall, is remove firefox dir and delete the alias or/and launcher from panel.