Windows 10 will reach EOS (end of support) on October 14, 2025. For more information, see this article.

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

When I try to open firefox, I get a message saying that the process is already running. It isn't. I've checked task manager and it's not there, tried restarted and reinstalling and still I get the same message.

  • 1 reply
  • 6 have this problem
  • 7 views
  • Last reply by TonyE

more options

When I try to open firefox, I get a message saying that the process is already running. It isn't. I've checked task manager and it's not there, tried restarted and reinstalling and still I get the same message.

When I try to open firefox, I get a message saying that the process is already running. It isn't. I've checked task manager and it's not there, tried restarted and reinstalling and still I get the same message.

All Replies (1)

more options

There are a few possible causes for that error, for details see "Firefox is already running but is not responding" error - How to fix.