Firefox won't start, dialog says "firefox is already running" when it is not! There are no apps shown in the Task mangler, what gives?

This occurs on two different machines, one XP and one Win 7. I seems to occur when I close Firefox with a search or load in progress. There are no applications shown in the task manager, so there must be a process still finishing up. What would the process name be? I can wait several minutes usually and the problem goes away and Firefox will restart, but if I knew the process name I could kill it and restart Firefox.

It used 2 happen 2 me a lot, as well, on the old PC. The new one handles it pretty much instantaneously; & also, it won't be under the Applications tab in teh mangler (hehe), but under the Processes 1 probably as firefox.exe

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== This happened ==
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'''[http://www.mozilla.org/en-US/firefox/all/ Download Firefox Full Installer For All languages And Systems]''' {web link}
Save the file. Then;
Using your file browser, open the '''Programs''' folder on your computer.
'''Windows:''' C:\Program Files
C:\Program Files (x86)
'''Mac:''' Open the "Applications" folder.
'''Linux:''' Check your user manual.
Look for, and rename any Mozilla and Firefox folders by adding '''.old''' to them.
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If all goes well, remove the OLD folders when you are done.

Firefox was working just fine but the last few days it won't let me open it because it says it's already running but it's not how do I close it to open it?

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See also https://support.mozilla.com/kb/Firefox+is+already+running+but+is+not+responding

Fire fox will not open and give the message that program is already running when it is not and i have to restart my computer. i am running windows xp and this problem started after the last up date. i have tried uninstalling and reinstalling the program

is this a known issue?

If you close Firefox properly the problem will practically disappear.
To close Firefox properly:
:Closing Firefox ''(#close_firefox)'', avoid getting Firefox already running messages:  To properly shutdown Firefox when multiple windows or closing the
last window use File → Exit/Quit (or Firefox button → Exit).  Closing Firefox with the [X] in the upper right corner closes the window ("Ctrl+W") but that does not necessarily close Firefox if it has subtasks running.  If you want to close and reopen Firefox use the "Restart" within Add-ons if you made a change requiring a restart, or install "[https://addons.mozilla.org/en-US/firefox/addon/restartless-restart/ Restartless Restart]" ("Ctrl+Alt+R") which will allow you to take Firefox down and restart without having to check the Windows Task Manager to see if Firefox first actually ended. ([http://kb.mozillazine.org/Firefox_hangs Firefox hangs])
In checking the Windows Task Manager be sure to check the "Process" tab not the "Application"tab/

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http://www.websonic.nl/nieuws/firefox-4-nu-al-te-downloaden-21704

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== This happened ==
A few times a week
== many months ago

See http://kb.mozillazine.org/Firefox_hangs and [[Firefox hangs]] (Hang at exit

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Hi,
When I try to click on firefox, the little wait icon appears and then disappears. Nothing opens, not even safe mode. I've looked at the "Firefox won't start and there is no error message" help section and looked at my task manager processes. It seems that when I click firefox, it briefly appears on my processes and then disappears. This happened yesterday while I was in the middle of using it. At the same time, my Skype also crashed, which makes me think the two are correlated. The two programs still don't work. The only way that I can open firefox is if I install it all over again with the "launch firefox now" option checked at the end. When I have a firefox window open, I can open other firefox windows just fine. When I close it, nothing opens. Thanks for your help.

1) Start Task Manager
2) Open Processes (make the description area large enough to see)
3) look for a description that says ''firefox''
4) Select it and press End Process
'''Now Firefox should work properly.'''

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Firefox won't start, dialog says "firefox is already running" when it is not! There are no apps shown in the Task mangler, what gives?

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