Have you tried System Restore to a time before the issue started?
Could also try to reach the profile running in Safe Mode. Maybe it will be possible to solve the issue from there.
Not sure either of these will work but worth a try. Bob's suggestion of reinstalling Firefox also seems likely to cure the problem.
I can close the browser, but then it restarts by itself as tho it was starting for the first time. All my browser preferences (previously set) revert back to the default settings. I have read several suggestions that this has something to do with the profile. I checked, and only have 1 profile listed, the default one. I can not open it due because the directions say NOT to open unless the browser is closed, which as I stated above, never happens for more than a few seconds.
I have run several malware, antivirus and rootkit programs and have not found anything of consequence. I have also tried to do a system restore to a date previous to when this first started happening, but that didn't help either. Btw, running XP SP3
Any suggestions would be appreciated.