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.
15 September 2006Tonight I accidently deleted my Firefox profile, thus it wouldn’t let me open Firefox, I kept getting the error mentioned above. This was because it was looking for a profile that no longer exists. Here is what I did to fix it:
I went to command prompt (start -> run –> cmd), then I changed directories until I was in: c:\program files\mozilla firefox\, from here I ran: firefox.exe -profilemanager
So it would be:
C:\program files\mozilla firefox\firefox.exe -profilemanager
This could be different depending on your configuration. After running that, the profile manager popped up. I deleted my old profile and created a new one, and I was good to go.
Hope this helps for anyone who might encounter this problem. Cheers.
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29 Responses to “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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Thanks For Visiting!
October 3rd, 2006 at 6:24 am
It works .. 10x
October 18th, 2006 at 10:16 am
OMG - thank you so much! I was having the same problem and this totally helped - thank you!
November 20th, 2006 at 11:20 pm
thanks. i had the same problem in linux and yahoo returned ur site on search, followed ur steps and here i am browzing in firefox.
November 24th, 2006 at 9:42 am
I was getting this error and found this site through Google.
I tried your solution and it worked perfectly. The profile was the culprit. Thank you.
December 5th, 2006 at 1:00 pm
Great solution! I’ve never had a problem with Firefox and then this happened. I believe it was caused by a virus because my Norton notified of a problem in the Profiles folder and then Firefox would not work. I think the virus renames your folder with that strange text string and screws everything up. Thanks again for your help on this issue
December 17th, 2006 at 12:57 pm
Thank you! This was exactly what I needed to know.
December 17th, 2006 at 1:03 pm
You’re welcome! :)
December 27th, 2006 at 12:19 pm
Thanks, you solved my issue.
This should be added to mozilla knowledge base
January 12th, 2007 at 3:51 pm
Hey, thanks a lot! I had the same problem and I have used your solution :)..it worked, only that I did not delete my old profile, I want to recover some info…
January 12th, 2007 at 4:15 pm
wont work fo rme
April 8th, 2007 at 4:55 pm
there is an easier way, if you do it that way you run the risk of loosing saved passwords
hit ctrl+alt+del go to processes and click the image name bit at the to of the process list, then look for firefox.exe and right click then click end process, firefox will start up normally when you double click the icon after this, it saves having to create a new profile for it
April 8th, 2007 at 7:42 pm
Jake: That didn’t work for me when I had this problem. Even with no processes running, starting Firefox would repeat the error until the solution I described. Thanks though.
April 18th, 2007 at 2:24 pm
thank you very much. We really appreciate
May 19th, 2007 at 1:25 pm
Had same problem - found this site via Google search and Bingo it worked ! Thank you.
Likewise even if I shut the process via Tsk Manager - it still did not work. This tip did what it !says on the tin” for me . .
July 6th, 2007 at 6:15 pm
For those still having problems, try this:
http://www.mattcutts.com/blog/how-to-fix-firefox-is-already-running-error/#comment-108044
August 17th, 2007 at 10:52 am
I ran into this in my Domain with AppData folder redirection. this was a shared account and I would get the error if another computer had firefox open. If I closed on the other computer it would work fine. I used this solution to move the profile to “C:\Documents and Settings\%username%\local settings\application data\Mozilla\Firefox\Profiles\%username%”
Hope this helps any Admins
August 26th, 2007 at 1:02 am
thank you so much. this helped a couple of times.
August 31st, 2007 at 9:54 am
this worked great, thanks for posting.
September 20th, 2007 at 2:15 pm
Thanks a lot :)
October 4th, 2007 at 10:47 am
Thanks a lot man ! It worked like a charm !
October 16th, 2007 at 10:14 am
I had this problem when my profile was changed from local to roaming. Your solution worked!
October 17th, 2007 at 10:05 pm
Thanks.I don’t know if you still read the comments section but any idea why this works?
November 7th, 2007 at 3:45 pm
Awesome, i had this problem.. now solved 5Stars!
November 27th, 2007 at 3:41 am
Yeah! This did do what it said on the tin, thanks very much.
December 29th, 2007 at 12:30 pm
Bang…. your trick worked… Thanks for the tips
April 15th, 2008 at 11:25 am
i’m not having the error. the mozilla firefox windows open normally but isn’t responding for a long time.
May 1st, 2008 at 10:57 pm
I got the same error too.This solution worked for me well too.Thanx a lot.
June 16th, 2008 at 2:43 am
YEAHHHHHYYYYY! FINALLY FireFox is killed and I can use it again! Such a simple task fixed my months of problems of trying to use FF!!!
thank you!!!!!!!!!!!!!!
August 11th, 2008 at 6:44 am
I also had same problem on windows also I was unable to find process for Mozilla in the task manager.
I deleted all the files from mozilla from this location
C:\Documents and Settings\Tarams\Application Data\Mozilla
It works fine for me.