Firefox won't load

I have recently began using a Mac, I am running 10.3.6 on a new G5.
Every time I try to install firefox it bounces once in the dock and goes 
away. There is no profile in /Library/Application Support/ either in my 
User account or on the root.

I've tried this so many times that I can't remeber if the first time I 
tried installing it I clicked on the icon in the mounted installer 
image. I may have done this, but I have tried repairing permissions, 
searching for all things mozilla and firefox and deleting them and then 
reinstalling. I have just tried it again with the latest version. (the 
one offered as current, not a nightly build)

I would really like to get firefox going, it has to be something on my 
end, since I see that others are using it on this version of OSX.

This really stinks!

- dstefani