My version:
- wget http://www.mozilla.com/products/download.html?product=firefo...
- make && sudo make install
- change symlink at /usr/bin/firefox to point to new binary
- wget http://www.mozilla.com/products/download.html?product=firefo...
- make && sudo make install
- change symlink at /usr/bin/firefox to point to new binary
That way you get a proper package.