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.

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

Problem reopening Firefox

  • 3 replies
  • 25 have this problem
  • 8 views
  • Last reply by cor-el

more options

When I try to reopen Firefox shortly after closing it I consistantly get an error message that reads "Firefox is already running, but is not responding. To open a new window you must first close existing the Firefox process or restart your system."

When I try to reopen Firefox shortly after closing it I consistantly get an error message that reads "Firefox is already running, but is not responding. To open a new window you must first close existing the Firefox process or restart your system."

All Replies (3)

more options

Chosen Solution

more options

Thanks that has fixed it

more options

You're welcome