I have the problem described in /forums/knowledge-base-articles/704725. (Firefox is already running but not responding). My only solution is to use Task Manager to end the firerfox process. I am the only user and there are no other profiles on my system

Occasionally I have the problem discussed in /forums/knowledge-base-articles/704725 , Firefox is already running. My only fix is to use Task Manager to end the firefox process. At such tmes, I have no other instances running.

'''https://support.mozilla.org/questions/997866?esab=a&s=&r=1&as=s'''.<BR>
This is not a cure but will make it easier if Firefox locks up.

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It always says:Firefox is already running but not responding; what can i do to fix this problem; it has only started after having downloaded the latest verion.

I downloaded the latest version of firefox and the problem has started; it aways says: "Firefox is already running, but not responding. To open a new window you must first close the existing Firefox process or restart your system; I have to do this about 3 times for the internet to come on again; what can I do, short of calling a technician??

Please read this article: [[Firefox is already running but is not responding]]

I am connected to the internet and I close all tabs on the screen. Now I want to open a new tab, but Firefox opens a pop-up window stating"Firefox is already running, but not responding . To open a new window, you must first close the existing Firefox pr

I am connected to the internet, but all tabs are closed. Now I want to open a new tab, But Firefox pops-up with "Firefox is already running, but not responding. To open a new window, you must first close the existing Firefox process, or restart your system". Does anyone here know how to fix this? Thank´s, BL.
== This happened ==
A few times a week

Firefox is shutting down windows I want to remain open. Example: I am done viewing one window. I click the X to shut the window and it shuts two windows. Every single time, attempt to close one windows, two windows close. Lately, I have been opening several windows with nothing but google search, just so it will shut that window and not something else I want to remain open. I could understand this if I was using tabs, but I am not. This has been going on for over two weeks. I don't like going back to history to open a window, I did not want closed in the first place. Isn't that what 'Windows' is all about? Any ideas?

On switching on, a message says 'Firefox is already running but not responding...........' then tells me to close it and restart but how can I close it when the page isn't yet displayed?

When I switch on my computer I get the desktop then I try to click on Mozilla Firefox but get the message, 'Firefox is already running but not responding. To open a new window you must first close the existing Firefox process or resart your system.' I looked up how to close but I need to click on 'file' then 'exit'. How can I do that when I can't see the page yet? IE is working fine.

See also [[Firefox is already running but is not responding]]

"Firefox is already running but not responding" - have tried all the usual solutions.

The message I'm getting is the standard: "Firefox is already running, but is not responding." I'm using a PC with Windows 7.
I've tried:
- Opening task manager and manually ending the process. This didn't work because the process is not listed in applications, processes, or services.
- Deleting the parent/lock file. This didn't work because the file is not in any of the firefox folders. I've checked APPDATA/Local/Firefox as well as APPDATA/Roaming/Firefox, and the original install folder just to be thorough. It's not a hidden file either - I have those set to display.
- Creating a new profile and importing settings from the old one. I can't import settings because the old profile is still running.
- Restarting before and after each of these potential solutions, including restarting in safe mode, shutting off the computer and waiting a bit before restarting, etc.
All I really want back are my bookmarks, which I've spent quite a while creating. Unfortunately, there is no file I can find for the default profile that has the bookmarks stored. When I created a new profile, a folder appeared with its name in the APPDATA/Roaming/Firefox folder, with all of the bookmarks, etc. There is no such folder for the default profile though - which is the one I want. I've even tried switching to Chrome and importing bookmarks, but that doesn't work because the bookmarks can't be imported while Firefox is still running.

Does a new profile work?<br />
* http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows
If there is no profile present then you also get that error about "Firefox is already running but not responding"
If you uninstalled Firefox at any time in the past and removed your personal data or deleted that profile folder yourself then you no longer have a profile to start with or restore files from.
See:
* http://kb.mozillazine.org/Recovering_a_missing_profile
* http://kb.mozillazine.org/Profile_in_use

Firefox 29.0.1 on Windows 7 (64-bit): ALWAYS get "Firefox is already running but not responding..." error and need Task Manager to close/restart Firefox.

I run Firefox 29.0.1 on Windows 7 (64 bit) and I get the "Firefox is already running but not responding. In order to open the program you must close the existing window." error. EVERY TIME I try to start Firefox. The posted solution works to start the program, but it is not a permanent solution. I go through the Task Manager and end the old Firefox process, then I can open a new window. While working, I can open multiple tabs and multiple windows, everything seems to (usually) work the way it should. Then after I completely exit Firefox, in order to open the program again I need to fix the SAME error again. Every time. It doesn't seem to hurt anything really, but it is quite annoying.
I used to get this same error on some of the older Firefox versions but it was only once in a while. With the new 29.0.1 it is literally EVERY TIME I TRY TO RUN FIREFOX!!!!
So, down to the big question: is there a permanent fix for this yet? Or will there be one included in the next version update? Or am I going to have to go back to Internet Explorer? I know I am not alone in this experience; i've seen several other users posting similar questions but none of them received satisfactory answers. So what's the story here, team Firefox?

'''https://support.mozilla.org/questions/997866?esab=a&s=&r=1&as=s'''.<BR>
This is not a cure but will make it easier if Firefox locks up.

Firefox is already running but not responding,No process in task manager,Restart and uninstall not useful.Profile manager error

So one day when I opened my mozilla firefox Ive got the "Firefox is already running but not responding.To open a new window,you must first close the existing firefox process,or restart your system."
So I checked my task manager but there is no process,I then checked hours in the internet to find a solution.Yes,I also checked for solutions in this site.Then,I try uninstalling and restarting,it also didn't work,Next I also tried downloading profilemanager and tried to run it but as unlucky as I can be,it also didn't work. Please help :(

The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information.
Note: ''This will cause you to lose any Extensions, Open websites, and some Preferences.''
To Reset Firefox do the following:
#Go to Firefox > Help > Troubleshooting Information.
#Click the "Reset Firefox" button.
#Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
#Firefox will open with all factory defaults applied.
Further information can be found in the [[Reset Firefox – easily fix most problems]] article.
Did this fix your problems? Please report back to us!

Every time I try to load firefox, WindowsXP says firefox is already running but not responding and before it can load another I have to shut down the one running and reboot my computer.

My problems started when I downloaded Ilivid downloader, after I loaded the program and watched the short video the program started messing up my computer. It spread itself all over my hard drive, changed my homepage, my search engine, locked me out of being able to change certain settings, made some of its files undeleteable and since then my firefox will not load. I removed my version of firefox and reinstalled it several times. I still got the same response. I went into the registry and deleted all references to Mozilla and Firefox and reinstalled it again, same response. I spent days trying to delete all references to ilivid downloader and every file I could find that made any reference to ilivid. I hope you can help me with my problem. I like using firefox and would like to start using it again. Thanks

See
* [[Firefox is already running but is not responding]]
Try closing any running instances of ''firefox.exe'' (and plugincontainer.exe) using something such as Task Manager. That should allow you to then restart Firefox.
As for iLivid. Possibly it also has associated apps or extensions with names not including the word iLivid. Looking at their own FAQs there are instructions to remove iLivid using the Windows Control panel, and mention of other bundled software that you may wish to remove. It seems it is more of a nuisacne rahter than out and out malware.
* see http://www.ilivid.com/faq.htm (page scrolls for more info) but includes:
How do I uninstall the software?
The software can be removed in a simple was like any other software:
Go to the Windows Start menu and then to Control Panel > Add/Remove ("Programs & Features" in Vista & Windows 7) and click "Remove" next to the software name (e.g iLivid Download manager / Windows iLivid Toolbar ).
During the installation bundle software are offered, each can easily be removed following those instructions: Uninstall Yontoo Addon , Uninstall Search Toolbar (powered by Bing) or Uninstall Babylon.

When I open Firefox I get the message "Firefox is already running but not responding . . .

I am using Firefox 3.6.9 with Windows XP SP3. Almost every time I try to open Firefox 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."
I then must open Task Manager and find Firefox and stop the process.
I run Firefox on 4 Windows machines and this is the only machine that I have this problem on.
I have looked at the Mozilla Firefox KB and have tried to check on the items that could be causing the problem. I have update my Java in Firefox. I have un-installed Firefox leaving the Bookmark preferences, etc. on my machine, ran CCleaner to clean the Registry of remaining Firefox items and then re-installed Firefox - I still have the problem.
I have installed Google Chrome to fix this problem but now I find that several of the websites and companies I do business with are not compatible with Chrome.
How can I fix this problem? Why am I only having this issue on 1 of my 4 Windows machines?
Thanks!
Bill Artman

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

When I use a GSI external antenna for WiFi I first get a message that "Firefox is already running but not responding etc", and then Firefox crashes. Can anyone help please?

Because of weak WiFi signal I need to use an external antenna (GSI USB wireless WIFI long range network adapter). My computer can see the signal clearly and shows that I am connected to the right network. But when I try to launch Firefox I get a message 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." When I click "OK" Firefox tries to load websites but gives up and reports "Problem Loading". It looks like Firefox is having trouble "seeing" the signal from the external antenna. What do I need to do please?

Try Ubuntu support, I don't think your problem is with Firefox - it will use the connection that the Operating System "makes". I'm a real noob with Ubuntu myself, and don't think I can help you figure out the problem.
http://ubuntuforums.org/

I get the message "Firefox is already running but not responding" and I have tried all of your solutions and nothing has worked so what do I need to do?

My daughter downloaded Babylon (incredibar) malware and we tried to reset Firefox. It got hung up and I closed the window. When I tried to restart Firefox, I got the messsage "Firefox is already running...". I uninstalled and reinstalled Firefox as well as restarting the computer a number of times. I followed the Mozilla help info and deleted the profile locked. parent(?). I use Windows 7 Ultimate.

hello sdandccids, unfortunately this babylon software is hooking-in deeply into the system. especially the component browsemngr.exe (+dll) is known to crash firefox and possibly might also cause the issue you're experiencing.
please go into the windows control panel > programs section and sort the software according to installation date & then remove all entries that got installed at the same date as the babylon toolbar and you're not familiar with ([https://support.mozilla.org/questions/935739#answer-367152 according to babylon] this might be "Browser Manager" + "Bprotector" + "Object Installer" + "Babylon Toolbar on IE").
in case this doesn't work or there are no such entries showing up, please hit ctrl+shift+esc and search if there is a file named browsemngr.exe showing up as running in the list of processes - if so here are instructions for a manual removal (unfortunately quite technical): www.explosiveknowledge.net/main/2012/08/19/browsemngr/
otherwise you can also try a "clean uninstall". uninstall firefox from the windows control panel & chose to remove all personal data. afterwards manually check if the firefox program folder got deleted (it's usually in ''C:\Program Files\Mozilla Firefox'') and else remove it manually. then download & install a fresh copy at getfirefox.com
i'd furthermore recommend doing a full scan of your system with the security software already in place and/or a different tool like the [http://www.malwarebytes.org/products/malwarebytes_free free version of malwarebytes] since this firefox start-error can also be a sign of other [[Troubleshoot Firefox issues caused by malware|malware]] active on the pc.

I have windows xp and am told firefox is already running, but not responding and I have to close existing firefox process or restat. neither works, suggestions?

I have gone to windows manager and deleted the firefox process.
I am able to use explorer and firefox as another user, but not on my primary account.

This Knowledge Base article may help you: http://support.mozilla.com/en-US/kb/Firefox%20is%20already%20running%20but%20is%20not%20responding

I open firefox it keeps saying"Firefox is already running,but not responding.To open a new window,you must first close the existing Firefox process,or restart your system" i tried restart my computer...but it's still keep saying that..pls help me..

As I stated above, I have to constantly restart my computer because I get a message stating firefox is already running.

Do you see a firefox.exe in the Task manager if you look there right after you get this error message?
You do not have to restart the computer, just kill that process.
This situation may occur if Firefox was not closed correctly or crashed.

I try to open firefox(i get this message)firefox is already running,but not responding.you must close the existing firefox process,or restart system.I try reboot (no help)I can not find any existing process to close!

When I log on to my wife account (same computer) her firefox opens and preforms just fine. I even unistalled firefox and reinstalled and it does the same thing..

Hey GreenViking,
You can kill the process manually by right clicking in the task bar (next to the time and date) and opening the task manager.
[https://support.mozilla.com/en-US/kb/Firefox%20hangs#w_firefox-hangs-when-you-quit-it This article] has some information about Firefox hanging when you try to close it.
Hope that helps!

I frequently find that when closing Firefox, and try to reopen again, get error message "Firefox is already running, but not responding. Recommend to close it, or restart system". Using Windows Task Manager, no application is found. After restart, OK.

At the update to Firefox 3.6.8, I also updated to Flash 10.

I get this problem often, on my computer which runs XP, I find simply waiting a few moments (up to a minute) is enough to end the process.
On my Vista machine, it sometimes works that way, but if FF locked up (stopped) and is ended through the task manager, it often requires a reboot or a much longer wait (up to 10 minutes or more).

I have the problem described in /forums/knowledge-base-articles/704725. (Firefox is already running but not responding). My only solution is to use Task Manager to end the firerfox process. I am the only user and there are no other profiles on my system

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