I am stuck on v7.0.1 of Firefox on Windows 7 because each time it restarts it gets the following error:
The update could not be installed. Please make sure there are no other copies of Firefox running on your computer, and then restart Firefox to try again.
What got leaked that Firefox thinks it is already running when it is not. Restart of computer does not help. Is there some file I can manually delete to correct this and allow the installation to proceed?