It worked before and all I did was press Fn and F8 and F9 on my keyboard, after that, all my keys on the keyboard didnt work. After restart, keys worked but cannot press enter button on the Firefox address bar, the extention search field works. Only the address bar, I cannot press enter.

And also, the LEFT RIGHT navigation buttons don't work on the browser.

I'm going to try to reinstall Firefox now..

SYSTEM INFO
Compaq M2005US Laptop
SuSE 9.3 Professional
KDE 3.4
Kernel 2.6.11.4-21.7-default

UPDATE
On Firefox, the forward/back navigation buttons don't work too.

UPDATE
Might be a X11 Problem.

UPDATE
When I opened firefox from terminal, the enter button worked the first time, then when I closed and attempted again, problem occurs again.

UPDATE
I changed the homepage settings on Firefox's preferences, now works BUT when I click on the Firefox icon, two FireFox windows open, one that actually works and the other attempts to be loading on the K-Menu bar but then dissapears after 15 seconds.

UPDATE
Oh no, reinstallation didn't work either. What to do???

UPDATE
Reinstalled ALL x-org packages, it now works BUT, it opens two Windows and one of them works, the other appears to load on the bottom Panel. Then goes away after 15 seconds.

UPDATE
Broke again, everything back to the way it was in the begining. HELP. The first Window, the address bar, I cannot press Enter, every other Firefox window I open there after, works but opens with another firefox, just pretending to load on the Kmenu task panel, then dissapears after 15 seconds.

on my laptop, the FN button toggles different key behaviors on and off.

you did try hitting it again to toggle whatever you did back off right?