Install Firefox 2.0 on Solaris 9

First, find it on the internets. Go to google and search for "firefox-2.0.0.2.en-US.solaris8-sparc-gtk1.tar.bz2". Or just click the link and download the file I have conveniently linked for you. Save it to your /home directory.

Next, do this:
# cd (get into your home directory - or wherever you have saved this file)
# tar xjv firefox-2.0.0.2.en-US.solaris8-sparc-gtk1.tar.bz2 (this should work but I just unbunzipped it on my fedora box, tarred it and then ftp'd it over to my Solaris box. So whatever works best for you).
# cp firefox-2.0.0.2.en-US.solaris8-sparc-gtk1.tar /usr/bin
# cd /usr/bin
# tar xvf firefox-2.0.0.2.en-US.solaris8-sparc-gtk1.tar (this will untar it in the /usr/bin directory)

Then just add /usr/bin/firefox to your path and you're all set.
# firefox &