sorry but firefox is easier to install without rpms now-a-days like this
1 download file to your /home/name/download folder
http://www.mozilla.com/products/down...nux&lang=en-GB
its a bz2 so may look scary but its just a compressed file like a winzip file.
2 as you are newbie you are hopefully using KDE and the file manager Konqueror can open the compressed file....when it opens move it to /home/name/
so it becomes /home/name/firefox 1.5.0.6
3 right hand click empty space on desktop select Create New....link to application....go to the last tab and click on the command Button next to browse.....navigate to /home/name/firefox1506/firefox......go back to left hand tab and click on icon then scroll down to pick any icon you like or the firefox icon.....click ok
4 left hand click (assuming right hander) or double click to open browser....click on edit properties and you can unselect automatic checking for updates if you prefer.....then you click on help and manually check for updates.....firefox will download the updates....and you restart firefox to start up a new firefox