FF remains as an active process after shutdown and the process must be closed manually
When FF is closed it remains in RAM (not always but mostly) and the activity must be terminated manually before FF can be restarted
Krejt Përgjigjet (2)
An after thought - I have a Beta version of FF installed and on reflection it may have started after installation of this FF4 Beta although I am using 3.6.15 where this problem arises.
You can run into all sorts of problems when you switch back and forth between different versions of Firefox while using the same Profile for both.
Create a new profile exclusively for the 4.0 beta version and create a desktop shortcut with -P "profile" appended to the target to launch that profile.
- http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows
- http://kb.mozillazine.org/Shortcut_to_a_specific_profile
- http://kb.mozillazine.org/Using_multiple_profiles_-_Firefox
Also, see hangs at exit in the KB article.
https://support.mozilla.com/en-US/kb/Firefox%20hangs