Firefox not working?

Well I upgraded my firefox today when it said there was an upgrade and now it won’t load up… It shows in my task manager it is running at 29,000k so it is running but the screen won’t show up so I have had to go to my backup opera where I have no info saved on here. Anyone know why? Its really ticking me off right now cause I want to get back on my sports forum.
Answer #1
Try ending the process in task manager and opening the program again.
If you’ve done that, and it didn’t help, delete the user profile or completely delete the application data folder.
Answer #2
Funnily enough I’ve had that happen twice now with Opera. The same thing as your explaining, was running in the task manager at something or other. I had to unistall it and reinstall it, loosing all my feeds and email settings. Now I just back up all the data in the application data and local settings, and hopefully if it happens again that will sort it. I’d go with what the poster above suggests, as I don’t use FireFox. Strange how it happens to both browsers though