Uninstall Firefox through the Control Panel, then remove the entire Firefox folder stuff reismark mentioned (not just the extensions subfolder), and make sure the Firefox program folder is gone too (C:\Program Files\Mozilla Firefox, I think). That would get rid of all of Firefox.
Re-install...
And instead of removing folders you can just move them somewhere else, so you can at least recover your bookmarks.
How exactly can they not be installed?
Re-install...
And instead of removing folders you can just move them somewhere else, so you can at least recover your bookmarks.
How exactly can they not be installed?
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