Firefox geek needed

I need the assistance of someone who knows all the ins an outs of Firefox 22.0. I've been running Firefox as my preferred browser for many, many years and it's always performed beautifully. Then last week, suddenly it's incompatible with my Windows 7 home premium OS. They've been getting along famously for a year and a half and now I can't get it to fully load. It starts and then without even starting to display it quits.

I can get it to come up under "Safe" mode with networking. It works as I would expect, so I presume that something that loads under the full operating system that doesn't load under "Safe" mode it what makes it incompatible.

I've tried two different (save info and destroy info) ways to uninstall and reinstall and it still comes up "Incompatible." Mozilla suggest it may be in the profiles and shows me how to find them, but doesn't say what to do about it. If you can and are willing to help me, please PM me.

I'm using Internet Explorer and not liking it.

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