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.

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.

  • 1 பதிலளி
  • 13 இந்த பிரச்னைகள் உள்ளது
  • 4 views
  • Last reply by Matt_G

archermjones
archermjones
more options

Every time I go to open Firefox 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.

Every time I go to open Firefox 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.

All Replies (1)

Matt_G
Matt_G
more options

Hi archermjones,

Have you looked at the Knowledge Base article "Firefox is already running but is not responding" error - How to fix? There is a lot of good troubleshooting information in the article.

Hopefully this helps!