Join the Mozilla’s Test Days event from Dec 2–8 to test the new Firefox address bar on Firefox Beta 134 and get a chance to win Mozilla swag vouchers! 🎁

This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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.

ఇంకా తెలుసుకోండి

Won't open

  • 1 ప్రత్యుత్తరం
  • 1 ఈ సమస్య కలిగినది
  • 1 వీక్షణ
  • చివరి సమాధానమిచ్చినది David McRitchie

more options

Won't open says please close already running firefox or restart computer. And I have restarted and shut down and it still won't open. WHAT THE HELL I've even deleted the program and downloaded it and it just won't work. HELP!!

Won't open says please close already running firefox or restart computer. And I have restarted and shut down and it still won't open. WHAT THE HELL I've even deleted the program and downloaded it and it just won't work. HELP!!

ప్రత్యుత్తరాలన్నీ (1)

more options

The application may have shut down abnormally, leaving the lock in place. To fix this, open the profile folder and delete the parent.lock file.

The quickest way to get to your profile is through Help>Troubleshooting information.. (or type about:support into the location bar) then use "Open containing folder".