Firefox is still running but does not show up in "task master" so it can be closed down and re-started?

1. Sometimes Firefox displays a message "Firefox is still running" but there is no evidence that this is true.
2. But, Firefox does not show up in "control-alternate-delete" to bring up Task Master in Windows 7.
3. There does not seem to be any means to stop Firefox and to re-start Firefox without a complete Re-start of the PC.
4. The mouse still works and the PC responds but there is no response from Firefox except the message "Firefox is still running..... etc.
5. How to stop Firefox, shutdown Firefox without a complete reboot/restart?

Way too complicated to solve the problem of "firefox is already running ....etc." and there must be a more simple solution to this problem which occurs once in awhile.
It seems to me that Mozilla developers can find a better solution and one that allows control-alternate-delete to fix the problem.
Otherwise, it is just resort to the old reboot solution.

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Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system. I have a wndiws 7 system and use a Intel core processor. I have restarted several times and still ge this

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== This happened ==
Every time Firefox opened
== today ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; MDDS; InfoPath.2; .NET4.0C; AskTbUT2V5/5.8.0.12304)

'''Kill Application'''
In Task Manager, does firefox.exe show in the '''Processes''' tab?
See: [http://kb.mozillazine.org/Kill_application Kill Application]
'''Causes and solutions for Firefox hanging at exit:'''
[[Firefox hangs]]
[http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit Firefox hangs at exit]
[[Firefox is already running but is not responding]]
'''Safe Mode'''
You may need to use '''[[Safe Mode]]''' (click on "Safe Mode" and read) to localize the problem. Firefox Safe Mode is a diagnostic mode that disables Extensions and some other features of Firefox. If you are using a theme, switch to the DEFAULT theme: Tools > Add-ons > Themes '''before''' starting Safe Mode. When entering Safe Mode, do not check any items on the entry window, just click "Continue in Safe Mode". Test to see if the problem you are experiencing is corrected.
See:
'''[[Troubleshooting extensions and themes]]'''
'''[[Troubleshooting plugins]]'''
'''[[Basic Troubleshooting]]'''
If the problem does not occur in Safe-mode then disable all of your Extensions and Plug-ins and then try to find which is causing it by enabling '''one at a time''' until the problem reappears. '''You MUST close and restart Firefox after EACH change''' via File > Restart Firefox (on Mac: Firefox > Quit). You can use "Disable all add-ons" on the Safe mode start window.

Iget this when I try to open a session....Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.task mngr shows no open firefox processes.

I get this when I try to open a session....Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system.The task manager shows no open Firefox processes.I had two users on this laptop running Firefox and I tried deleting the program on both users. I then downloaded the newest version, installed it and I still get the error message as before. HELP!!!! I loved the browser program when it was working before and would rather use it than other browsers.

See "Hang at exit":
* http://kb.mozillazine.org/Firefox_hangs
* https://support.mozilla.com/kb/Firefox+hangs

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== This happened ==
A few times a week
== some 2 month ago ==
== User Agent ==
Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0; SLCC1; .NET CLR 2.0.50727; Media Center PC 5.0; .NET CLR 3.5.30729; InfoPath.2; .NET CLR 3.0.30729)

Hi Andis.
First of all, this is completely normal behavior, although it's a bit irritating, I know. What happens is that when you close Firefox, despite the window disappearing right there and then, Firefox keeps running for a little bit until the whole closing procedure is completed. This can take a fraction of a second on fast computers, or can take a few seconds on slow computers or when Firefox is storing a large session (if you save your tabs). All you have to do is wait a bit until Firefox closes, and then open it again.
To see if it's still running, you can press CTRL+SHIFT+ESC and then, under the Processes tab, you can see if firefox.exe is still there. If it's taking an unusual amount of time to close (which happens very rarely, and only if the browser freezes on exit), you can force the application to terminate from this application (task manager).
Firefox 4.0 will reduce by 97% the time it takes firefox.exe to close, so this problem will be basically erased for Firefox's next version.
Until then, I can recommend you this extension, which helps you restart your browser more easily and without bothering about closing times:
https://addons.mozilla.org/en-US/firefox/addon/3559/
Hopefully this will help.

Why does firefox stop loading then when i close it and try to open it up again I keep getting this message:Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart your system

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When i open firefox it runs in background but does not open. if i disable the internet connection immediately it opens. each and every time i do this when i start work. what kind of problem is this

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== This happened ==
Every time Firefox opened
== i every time starts firefox

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Sometimes Firefox will not open, telling me, it is already running. It does not show in the task manager and the only solution is to reboot.

Firefox is running. I close the program. I try to reopen it. I get an error message: Firefox is already running. It does not show in the task manager, nor anywhere else. I can not close the old version, nor start a new one. I have to reboot.

Did you look in the Processes tab in the Task Manager?
See also "Hang at exit":
* http://kb.mozillazine.org/Firefox_hangs
* [[Firefox hangs]]

After trying every suggestion and uninstalling & installing with clean copy. I still get firefox is already running, but is not responding. To open a new window

I have tried to restore to an earlier period. uninstalled then reinstalled mozilla, and restarted numerous times, but whenever I try to open the message Firefox is already running, but is not responding. To open a new window, you much first close the existing Firefox process, or restart your system.
Can use some advanced insight on this.

Try to use "Firefox > Exit" (Windows: Firefox/File > Exit; Mac: Firefox > Quit Firefox; Linux: Firefox/File > Quit) to close Firefox if you are currently doing that by clicking the close X on the Firefox title bar.
See:
*http://kb.mozillazine.org/Profile_in_use
*https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding

Firefox is still running but does not show up in "task master" so it can be closed down and re-started?

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