That is a fairly old version of Linux, it might not meet Firefox System Requirements for a Firefox 3+ version.

http://www.mozilla.com/en-US/firefox/system-requirements-v3.html

http://www.mozilla.com/en-US/firefox/system-requirements.html

I had to update the GTK package in the version of Xandros that came with my eeePC netbook before installing Firefox 3.

I used these steps to install Firefox 6.0 on my eeepc (I've got Xandros on mine): 1. Close Firefox. Nothing else should be open.

2. Hold <Ctrl> and <Alt> and press the <T> key to open a Terminal / Console, and enter the following command:

sudo bash install_firefox.sh

5. Wait until done (at this point you will have installed Firefox version 3.0.1; you can continue now to install the very latest version)

6. Again in the Terminal / Console, enter

sudo firefox

7. Once in Firefox, select Help »> Check for Updates…

8. After everything is done. Close Firefox and the terminal window.

9. Now, you'll have the 3.0.1 version on your pc. I checked for updates till my Firefox gets the version 6.0. It worked fine.

Sorry my bad English! I hope it helps you. Good luck!