EDIT: Updated repos in /etc/yum.repos.d/ to FC5 and firefox 1.0.4 to 1.0.4-5 in which fixed this problem.
I did an update last night in which updated me to FC5. I opened FireFox 1.0.4 and it shows nothing but lines that look like this -->
_
I uninstalled FF and reinstalled it, but no luck, any suggestions?