Mozilla Browser Extension no longer work.

I've recently been using Firefox as my main Browser and it has worked great for me. But recently I've been unable to open my Extension Manager (Tools, Extensions). I can open everything except that. Any Ideas??? I've tried uninstalling Firefox and reinstalling it but for some reason after I reinstall Firefox it remember all of my previous settings. Anyone know how I can reset all of my setting to default and start completely fresh with Firefox again. Thanks.

 

Un-install, then delete the Firefox Directory (should be something like C:\Program Files\Mozilla Firefox) it leaves the folder there when you uninstall, incase you are upgrading to a newer version.

 

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