Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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

sometimes when I try to open firefox it says another application of firefox is already running and I have to close it first,isn't.

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by cor-el

more options

At least once a day I try to open Firefox and it won't let me. It says another application of Firefox is already running and I have to close it first. There is no other applicaion of Firefox running, and I have to reboot the computer.

At least once a day I try to open Firefox and it won't let me. It says another application of Firefox is already running and I have to close it first. There is no other applicaion of Firefox running, and I have to reboot the computer.

All Replies (1)

more options

See "Hang at exit":

See "Firefox hangs when you quit it":