As a matter of fact, I just uninstalled Firefox 3.6.? (9, I think). Very unstable here. I had previously disabled all extensions one by one, then removed all of them and added them back one by one, created a new profile, etc., etc. All the usual suspects, or recommendations. Nothing helped. Same problems appeared running FF in Safe Mode. (Firefox safe-mode, not Windows Safe-Mode).
Any link that opened a pop-up window froze FF for a good 1 to 3 minutes, every time. Firefox would continually freeze and get that "(Not Responding...)" notation in the title bar with almost any routine action - like starting to type text into any form, even forum reply boxes like this one. I found out that if I minimized all open windows there would be a message that read "Server busy..." and had buttons for Retry, Switch to..., and Cancel, though Cancel was often grayed out. I never did find the cause for that one but it was frequent and really frustrating. Looks like this:
It would mention just about any and every other open app on my box. Some more examples:
I'm using Chrome just about full-time now, and I have been trying out IE8. I am reluctant to give Firefox another go just yet because I have spent SO much time troubleshooting it for the past year!
So no, you are not alone Renegade.