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

can't start firefox 'cause it notifies me that there is allready a copy running, but that's not true. Please help.

  • 3 ŋuɖoɖowo
  • 1 masɔmasɔ sia le esi
  • 14 views
  • Nuɖoɖo mlɔetɔ cor-el

more options

I get this message when i try to start a Firefox:

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

I did restart many times but it is a bogus message because there isn't any other copy running, for sure.

I get this message when i try to start a Firefox: 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 I did restart many times but it is a bogus message because there isn't any other copy running, for sure.

All Replies (3)

more options

You can check if you still have a (default) profile folder as listed in profiles.ini.
If not then delete profiles.ini and let Firefox create a new default profile.

more options

Thank you!

That worked!

I lost my bookmarks, but now I have a functional firefox.

Thanks a bunch.