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Firefox 3.6.10 doesn't shut down. Keeps running using 100% of my CPU so I can't play a game. etc., unless I use TUT to find it and shut it down.

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After I shut Firefox down, when I try to re-open it (in the same session) I get message "Firefox is already running but is not responding. To open a new window, you must first close the existing Firefox process or restart the system." So I would restart the computer, and it was ok until I shut down again. Finally I used TUT to see what was running in my programs and found that Firefox WAS still running, even though no obvious pages were open on toolbar, etc. Now I use TUT to shut it down instead of restarting, but it's still a nuisance. Should I reinstall Firefox?

After I shut Firefox down, when I try to re-open it (in the same session) I get message "Firefox is already running but is not responding. To open a new window, you must first close the existing Firefox process or restart the system." So I would restart the computer, and it was ok until I shut down again. Finally I used TUT to see what was running in my programs and found that Firefox WAS still running, even though no obvious pages were open on toolbar, etc. Now I use TUT to shut it down instead of restarting, but it's still a nuisance. Should I reinstall Firefox?

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