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

Help with nuisance message that appears

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

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)

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.

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.

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