This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

This thread was archived. Please ask a new question if you need help.

Help with nuisance message that appears

  • 3 replies
  • 1 has this problem
  • 5 views
  • Last reply by TonyE

ebb124
ebb124
more options

"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 message appears when I have closed Firefox but then attempt to reopen. It is not constant.

"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 message appears when I have closed Firefox but then attempt to reopen. It is not constant.

All Replies (3)

TonyE
TonyE
  • Moderator
more options

Possible causes for this error and how to resolve them are described in this article - "Firefox is already running but is not responding" error - How to fix, it sounds like in your case Firefox is not closing properly.

ebb124
ebb124 Question owner
more options

I can't open the article. If I either double click the link or paste it in the browser, it takes me to the question and answer I can't open the answer. Therefore, a new question. Is this the link? https://support.mozilla.com/questions/751526#answer-102233

BTW, thanks in advance.

TonyE
TonyE
  • Moderator
more options

The link to the article is https://support.mozilla.com/en-US/kb/Firefox+is+already+running+but+is+not+responding

An equivalent article from the MozillaZine knowledge base - http://kb.mozillazine.org/Profile_in_use