Where did you install Firefox from? Help Mozilla uncover 3rd party websites that offer problematic Firefox installation by taking part in our campaign. There will be swag, and you'll be featured in our blog if you manage to report at least 10 valid reports!

Etsi tuesta

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

Firefox is already running, but not responding.

  • 3 vastausta
  • 1 henkilöllä on sama ongelma
  • 23 näyttöä
  • Viimeisin kirjoittaja FredMcD

more options

Please help! I continue to get the ‘Firefox is already running, but not responding. The old Firefox process must be closed to open a new window.’ error.

I have tried everything suggested I’ve come across and I have still not been able to resolve the problem.

I have tried the following: -End Process from the Windows Task Manager Processes tab (firefox.exe will not close) -Kill task from Command Prompt -created a new profile -tried deleting the parent.lock from profile -restarted computer

None of these solutions are working! What am I missing?!

Please help! I continue to get the ‘Firefox is already running, but not responding. The old Firefox process must be closed to open a new window.’ error. I have tried everything suggested I’ve come across and I have still not been able to resolve the problem. I have tried the following: -End Process from the Windows Task Manager Processes tab (firefox.exe will not close) -Kill task from Command Prompt -created a new profile -tried deleting the parent.lock from profile -restarted computer None of these solutions are working! What am I missing?!

Kaikki vastaukset (3)

more options
more options

Thanks Fred. I previously tried all the options in link #1 you sent.

I don’t have a Mac, I’m not sure how to translate the info from links #2 & #3 to my PC.

Link #4 didn’t open for me.

more options

kate.chambers said

Link #4 didn’t open for me.

I informed the admin.