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

Error message to close firefox appears upon app launch and indicates that a copy of firefox is already open. How do I find the open copy and close it permanently?

  • 3 replies
  • 38 have this problem
  • 16 views
  • Paskiausią atsakymą parašė cor-el

more options

When I go into my daughter's account and try to launch Firefox (she was previously using Safari) an error message pops up indicating to "Close Firefox: A copy of Firefox is already open. Only one copy of Firefox can be open at a time." Except that I don't see an open copy of the app, unless it somehow is launched at login, a setting I don't see either. Firefox works fine on other user accounts.

When I go into my daughter's account and try to launch Firefox (she was previously using Safari) an error message pops up indicating to "Close Firefox: A copy of Firefox is already open. Only one copy of Firefox can be open at a time." Except that I don't see an open copy of the app, unless it somehow is launched at login, a setting I don't see either. Firefox works fine on other user accounts.

Chosen solution

Is there still a default profile folder present?

  • /Users/<user>/Library/Application Support/Firefox/Profiles/<profile>/

If not then delete the file profiles.ini
That will cause Firefox to create a new default profile.

Skaityti atsakymą kartu su kontekstu 👍 7

All Replies (3)

more options

Chosen Solution

Is there still a default profile folder present?

  • /Users/<user>/Library/Application Support/Firefox/Profiles/<profile>/

If not then delete the file profiles.ini
That will cause Firefox to create a new default profile.

Modified by cor-el

more options

thanks much! that took care of it.

more options

You're welcome