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

cannot launch firefox. error message reads " a copy of firefox is already open" though none is open.

more options

I cannot launch Firefox. Error message reads "Close Firefox. A copy of Firefox is already open. Only one copy of Firefox can be open at a time". But there IS NOT a copy open at all. Even after uninstall and downloading another copy, it will not let me launch. Same error message.

I cannot launch Firefox. Error message reads "Close Firefox. A copy of Firefox is already open. Only one copy of Firefox can be open at a time". But there IS NOT a copy open at all. Even after uninstall and downloading another copy, it will not let me launch. Same error message.

All Replies (1)

more options

Please read this article to see if it helps:


http://kb.mozillazine.org/Firefox_hangs#Hang_at_exit