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When trying to shut down ny computer, why nwill firefox not end, become unresponsive and not allow the computer to shut down?

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Using ff 3.6 and 4, when I try to shut down with ff open, ff does not respond and I must manually end it.

Running XP Pro on an HP laptop.

Using ff 3.6 and 4, when I try to shut down with ff open, ff does not respond and I must manually end it. Running XP Pro on an HP laptop.

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The following may not completely eliminate having to terminate Firefox through the Windows Control Panel but it will come very close.

Plug-in and tasks started by Firefox may continue after attempting to close Firefox The "X" in the upper right-hand corner closes the Window (same as Ctrl+Shift+W) but even if it is the last Firefox window, it does not necessarily close Firefox .

The only proper way to exit Firefox is to use Exit through the File menu, not the "X" in the upper right corner of last Firefox window. In the Beta that would be Alt+F then X

Use the Windows Task Manger to remove all running firefox.exe in the "Processes" tab of the Windows Task Manager, then restart Firefox.

If Firefox will still not start, remove the parent.lock file from the profile which is created each time Firefox is started to prevent other Firefox tasks from running, see
http://kb.mozillazine.org/Profile_in_use#Remove_the_profile_lock_file

Avoiding Problems with close/restart choose either extension

Use to close and restart Firefox after enabling or disabling an extension, switching to a new theme, or modifying configuration files, then you don't have to worry about delay or have to look in the Task Manager to see if Firefox is closed yet.

Uses keyboard shortcut "Ctrl+Alt+R" or a file menu option.