Firefox is OPEN and working fine, but when I click a link in Thunderbird I get '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.'

If I click a link on my desktop or in any other program (while Firefox is open and running), I get 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." There's about a billion links for this if you Google it, but they all say that Firefox wasn't shut down properly. (OK, maybe not ALL of them, but if the needle is in that haystack, I haven't yet found it.) That's not the issue in my case since I haven't shut FF down at all.
== This happened ==
Every time Firefox opened
== IDK

This began to happen to me when I tried to run two separate profiles simultaneously on the same installation of firefox with -no-remote

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    Firefox is "hanging at exit" when you exit/quit Firefox.<br /><br />
    #Stop the Firefox process:
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    #*Windows 7 users click [http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576 here]
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    *https://support.mozilla.org/kb/Firefox+is+already+running+but+is+not+responding
    *http://kb.mozillazine.org/Profile_in_use
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    * https://support.mozilla.com/kb/Firefox+hangs

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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. How do I fix this? I am ready to go back to internet explorer!

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    See [[Firefox is already running but is not responding|Firefox is already running but is not responding]].

  • 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 tried

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    Hi Pelle,
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  • I getthe 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. It is NOT open I onlly have one computer

    I installed FF on my new computer, Windows 7 Toshiba, I get the 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'''. It is NOT open I only have one computer.
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    Look for the firefox process firefox.exe and kill it with for instance task manager. it is also worth watching for plugincontainer.exe.
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    * [[firefox is already running but is not responding]]
    *[[firefox hangs]]

  • 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)

    <u>'''Kill Application'''</u>
    In Task Manager, does firefox.exe show in the <u>'''Processes'''</u> tab?
    See: [http://kb.mozillazine.org/Kill_application Kill Application]
    '''<u>Causes and solutions for Firefox hanging at exit:</u>'''
    [[Firefox hangs]]
    [http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit Firefox hangs at exit]
    [[Firefox is already running but is not responding]]
    <u>'''Safe Mode'''</u>
    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 <u>'''before'''</u> 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 <u>'''one at a time'''</u> until the problem reappears. <u>'''You MUST close and restart Firefox after EACH change'''</u> via File > Restart Firefox (on Mac: Firefox > Quit). You can use "Disable all add-ons" on the Safe mode start window.

  • I consistently get this messsage and have to restart the system - "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". When I look at the Task Manager no Fire

    I consistently get this message and have to re'boot my system. "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"
    == User Agent ==
    Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; GTB6.5; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET CLR 3.0.04506; InfoPath.2; Media Center PC 5.0; SLCC1)

    <u>'''Kill Application'''</u>
    In Task Manager, does firefox.exe show in the <u>'''Processes'''</u> tab?
    See: [http://kb.mozillazine.org/Kill_application Kill Application]
    '''<u>Causes and solutions for Firefox hanging at exit:</u>'''
    [[Firefox hangs]]
    [http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit Firefox hangs at exit]
    [[Firefox is already running but is not responding]]
    <u>'''Safe Mode'''</u>
    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 <u>'''before'''</u> 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 <u>'''one at a time'''</u> until the problem reappears. <u>'''You MUST close and restart Firefox after EACH change'''</u> via File > Restart Firefox (on Mac: Firefox > Quit). You can use "Disable all add-ons" on the Safe mode start window.

  • I get this message box when I click on a link (in a document or email)"firefox is already running, but not reponding. To open a new window, you must first close the existing firefox process, or restart your system"

    if Firefox is already running and click on any link in Word, Excel, Outlook, etc. A message box pops up and I have to hit OK to close it.
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    if Firefox is already running and click on any link in Word, Excel, Outlook, etc. A message box pops up and I have to hit OK to close it.
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