Originally Posted by chakka.lokesh
download the tar file. extract.
switch user to root using su command.
copy the extracted folder to /usr/lib
in the /usr/bin execute the following command:
ln -s /usr/lib/firefox/firefox
One more to add. Depending on your Linux distribution, it may also be necessary to upgrade your libraries. e.g in Debian 4.0 etch, you cannot install firefox 3.0.5 this way ...