Tried all the fixes for "Firefox is already running, but is not responding, " etc and am coming up blank. Do I have to just drop firefox?

Tried deleting firefox and reinstalling latest version to no avail.
Tried all fixes from previous questions to no avail.
Haven't seen anybody say that they've actually had a suggested fix WORK, but have seen hundreds of people with the problem.

To properly close Firefox use File > Exit as you already determined, and that you would have seen when looking for solutions.
But your real problem I believe is in how you are attempting to run multiple profiles at the same time. You can only have one default browser and only one default profile. Any other profile must be started with -no-remote and it is parent.lock that protects this to make sure that you use only one profile at a time.
For more information start with
* http://kb.mozillazine.org/Using_multiple_profiles_-_Firefox
For more details and setup, see
* [http://kb.mozillazine.org/Opening_a_new_instance_of_your_Mozilla_application_with_another_profile Opening a new instance of your Mozilla application with another profile - MozillaZine Knowledge Base]
* [http://kb.mozillazine.org/Command_line_arguments Command line arguments - MozillaZine Knowledge Base]

Similar Messages

  • 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" message when trying to open Firefox.

    I have found this particular problem addressed in the assistance pages, and have tried all of the suggestions (trying to delete parent.lock from the profile, restoring the profile, etc.). Nothing works. What's next?

    For possible causes see [[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

    After deleted profile my Firefox will not start
    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.
    I have tried – Restarting - Checking control panel for active firefox.exe –Uninstal l- Reinstall- and run CCleaner. All without any result
    Can You help me? Are there any other processes that can be running?
    Is there any cleaning tool available?
    Best Regards, Pelle

    Hi Pelle,
    Why did you delete your profile? Also how? Did you use the profile manager or did you delete from the windows file structure?
    It sounds like something during the profile delete has stopped Firefox from starting up. Please see the this article and follow the steps:
    Please see this article: [http://kb.mozillazine.org/Profile_in_use]
    --Edward

  • Error message "Firefox is already running but is not responding" - I have read and action the KB - no fix

    So before we start - I have read the KB (https://support.mozilla.org/en-US/kb/firefox-already-running-not-responding) and actioned the advice on how end the processes, delete the parental lock, etc. This gives a temporary but one time only fix and does not resolve the overall issue.
    I have also uninstalled and reinstalled the application.
    So why do I get the Error message "Firefox is already running but is not responding"?

    See also:
    *http://kb.mozillazine.org/Profile_in_use
    Note that in Firefox 13+ (expected to be released June 5) the parent.lock file is no longer deleted after closing Firefox to make it possible to check for startup crashes, so the presence of that file will in the future no longer indicate a problem.
    Create a new profile as a test to check if your current profile is causing the problems.
    See "Basic Troubleshooting: Make a new profile":
    *https://support.mozilla.org/kb/Basic+Troubleshooting#w_8-make-a-new-profile
    There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.
    If the new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.
    See:
    *http://kb.mozillazine.org/Transferring_data_to_a_new_profile_-_Firefox

  • I get the following message when trying to open Firefox: "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 rebooting the PC and can open Firefox once but if a close and try to reopen, same message pops up. Have also unistalled and reinstalled, to no avail.

    For possible causes see [[Firefox is already running but is not responding]].

  • When I click to open firefox it says that "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" and I've tried to shut down and restart my computer but it keeps

    when i click to open firefox it says that "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." and I've tried to shut down and restart my computer but it keeps showing the same message. I've even uninstalled Firefox and then reinstalled in the hopes that the problem would be solved but it this message is still popping up. What can I do to solve this problem?
    == This happened ==
    Just once or twice
    == I was on facebook trying to upload pictures yesterday. ==
    == User Agent ==
    Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 1.0.3705; .NET CLR 1.1.4322; Media Center PC 4.0; InfoPath.1)

    Do you have a profile lock file in your profile folder? If so, delete it and see if TB runs properly:
    http://kb.mozillazine.org/Profile_in_use#Remove_the_profile_lock_file

  • 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!

    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.
    This box appears and then firefox quits...never opens.
    I have uninstalled, and loaded firefox 5 times and never got it to run.

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

  • 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

  • Doesn't start when starting as administrator. Error 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.

    Update firefox, it asked me to update flash, I tried to update flash but it said I had to close firefox. A box came up and said the Flash install would continue when I closed firefox. I closed all firefox windows and no update of flash occurred. I tried relaunching firefox but got the "Doesn't start when starting as administrator. Error 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." message. I rebooted the system, no improvement. I tried to run firefox as administrator and got the same message. Either I find a fix or I won't be able to use firefox and will have to go back to ie.

    -> press '''CTRL''' + '''SHIFT''' + '''ESC''' to Open Task Manager -> Processes tab -> right-click '''firefox.exe''' and click '''End Process Tree''' -> close Task Manager
    Troubleshooting extensions and themes
    * https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes
    Troubleshooting plugins
    * https://support.mozilla.com/en-US/kb/Troubleshooting%20plugins
    Check and tell if its working.

  • I deleted the profile and firefox4 and then downloaded firefox4 again. But when i click firefox it says 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.HELP!

    somehow i couldn't get rid of one website called www.searchqu.com/405 set as my homepage... I tried all solutions given to change the homepage but whenever i restarted firefox that homepage used to come automatically.. So, I deleted the profile (even from recycle bin!!) and deleted the firefox and downloaded it again hoping to get my problems fixed (which didn't happen!) because i'm getting dialog box saying- 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.

    You don't say which operating system you have installed?
    Assuming it's Windows, right click a blank part of the Windows Taskbar and go to Task Manager. Then click the ''Processes ''tab, find '''firefox.exe''' and then right click it and choose '''End Process'''.

  • 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

    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 wndows 7 system and use a Intel core processor. I have restarted several times and still ge this error. I have also tried to reinstall firefox and get the same error
    == 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 close firefox and try to open it again later, it WON'T and says, "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." Firefox isn't running .

    After I turn on my laptop and click on firefox it works fine and it opens THE FIRST TIME. So can you help? i DON'T WANT TO RESTaRT my computer everytime and sometimes have to clsoe firefox b/c I'm typing paper and computer goes slow.

    Sounds like a "hang at exit" problem. There are several possible causes for that error. See:
    * How to stop the running Firefox process
    ** In Task Manager, does firefox.exe show in the '''<u>Processes</u>''' tab?
    ** See: http://kb.mozillazine.org/Kill_application
    * What may cause Firefox to hang at exit
    ** http://support.mozilla.com/en-US/kb/Firefox+hangs (see "Hang at exit" section)
    ** http://kb.mozillazine.org/Firefox_hangs
    ** https://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding
    * You may need to try Firefox Safe Mode
    ** You may need to use '''Safe Mode''' to locate the problem: http://support.mozilla.com/en-US/kb/Safe+Mode
    **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.
    ** 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.
    ** See the following for more information
    *** http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes
    *** http://support.mozilla.com/en-US/kb/Troubleshooting+plugins
    *** http://support.mozilla.com/en-US/kb/Basic+Troubleshooting

  • 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.

  • Sometimes when I close Firefox and try to open it in few moments it shows me 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." However, I haven't o

    Sometimes when I close Firefox and try to open it in few moments it shows me 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." However, I haven't opened any additional Firefox related programs, and previous Firefox is closed. First I though it is because of my computer, but then I discovered that other people have the same problem as well
    == 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.

  • Foxfire stays in back gro I get this script when I try to get back on Foxfire after closing it. Firefox is already running, but is not responding. To open a new window, you must first close the existing Firefox process, or restart.

    This happens 95% of the time when I close Foxfire and then later try to get back on. I usually have to restart my computer before getting back on to Foxfire.

    Sounds like Firefox is "hanging at exit". That problem is frequently caused by an Extension or a Plugin. Read all of the following articles.<br /><br />
    #Stop the Firefox process:
    #*[http://kb.mozillazine.org/Kill_application Mozillazine - Kill application]
    #*Windows 7 users click [http://www.techrepublic.com/blog/window-on-windows/reap-the-benefits-of-windows-7s-task-manager/2576 here]
    #*Mac users: http://techheavy.com/2011/02/the-mac-task-manager/
    #Why Firefox may hang:
    #*[http://support.mozilla.com/en-US/kb/Firefox+hangs Firefox hangs] (see Hang at exit)
    #*[http://kb.mozillazine.org/Firefox_hangs Firefox hangs (Mozillazine)] (see Hang at exit and Closing Firefox properly)
    #*[https://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding Firefox is already running but is not responding]
    #Use Firefox Safe Mode to find a problem with an Extension or Plugin:
    #*Don't check anything when entering Safe Mode, just continue
    #*If the problem does not occur in Safe Mode it is probably and Extension or Plugin causing the problem
    #*See:
    #**[[Safe Mode]] and [http://kb.mozillazine.org/Safe_Mode Safe Mode (Mozillazine)]
    #**[http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes Troubleshooting extensions and themes]
    #**[http://support.mozilla.com/en-US/kb/Troubleshooting+plugins Troubleshooting plugins]
    #**[http://support.mozilla.com/en-US/kb/Basic+Troubleshooting Basic Troubleshooting]
    '''If this reply solves your problem, please click "Solved It" next to this reply when <u>signed-in</u> to the forum.'''
    Not related to your question, but...
    You may need to update some plug-ins. Check your plug-ins and update as necessary:
    *Plug-in check: https://www-trunk.stage.mozilla.com/en-US/plugincheck/
    *Adobe Shockwave for Director Netscape plug-in: [https://support.mozilla.com/en-US/kb/Using%20the%20Shockwave%20plugin%20with%20Firefox#w_installing-shockwave Installing ('''''or Updating''''') the Shockwave plugin with Firefox]
    *Adobe PDF Plug-In For Firefox and Netscape: [https://support.mozilla.com/en-US/kb/Using%20the%20Adobe%20Reader%20plugin%20with%20Firefox#w_installing-and-updating-adobe-reader Installing/Updating Adobe Reader in Firefox]
    *Shockwave Flash (Adobe Flash or Flash): [https://support.mozilla.com/en-US/kb/Managing%20the%20Flash%20plugin#w_updating-flash Updating Flash in Firefox]
    *Next Generation Java Plug-in for Mozilla browsers: [https://support.mozilla.com/en-US/kb/Using%20the%20Java%20plugin%20with%20Firefox#w_installing-or-updating-java Installing or Updating Java in Firefox]

Maybe you are looking for