User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) Gecko/20050908 Firefox/1.4 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) Gecko/20050908 Firefox/1.4 When I play iFilm movies, and I attempt to exit a window, it will work (My settings are 300k, Windows Media content), but when I close down all open Firefox windows (I.E, my extra Google page), the windows close but the process still exists in Task Manager, and when I go to start FireFox again, I get an error message saying FireFox is already running, but is not responding. I do not get this error when using RealPlayer on iFilm, however I have used Windows Media more times so I can not confirm this to be 100% true. Reproducible: Sometimes Steps to Reproduce: 1. Go to http://www.ifilm.com 2. Open up 1 or more windows, then click "Watch Now" for a selected movie. 3. When the window opens, under media preferences select Windows Media and 300k quality 4. Watch the movie, and close the window before the movie ends (This is what I do) 5. Watch another 1 or 2 movies in the same manner 6. Close all FireFox windows 7. Go to the Start Menu, and try to start FireFox. Actual Results: I would get an error message telling me that FireFox was still running, and that is was unresponsive - basically telling me to kill the old process. Expected Results: Exited when I closed all old browser windows, and when I opened FireFox again, it shouldn't have displayed an error. N/A

*** This bug has been marked as a duplicate of 239223 ***

There are a lot of reasons for firefox is still running, when you closed all windows. You can't link all them together as a duplicate (for the same reason you can't mark a crash bug as a duplicate of another crash bug, or only fill one bug for all crashing-related bugs...) This bug here could be related to "Mouse Guestures 1.0.2". At least, I can reproduce that bug Reproducible: Always 1. Install/Activate Mouse Guestures 1.0.2 2. Open one browser window with the URL: http://66.203.200.162/details/mtake.php?video=stargateatlantis2M&type=wm&bandwidth=high 3. Close Firefox => firefox.exe Task is still running Try something else: 1. Install/Activate Mouse Guestures 1.0.2 2. Open TWO browser window, the second one with: http://66.203.200.162/details/mtake.php?video=stargateatlantis2M&type=wm&bandwidth=high 3. Close the second browser window => A warning-popup says, there was a problem with Media Player Plugin and you should restart mmartel1990: Can you confirm, your bug resolved out of this or another extension, and doesn't appear when you deactivate all extensions?