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.

Avatar for Username

ابحث في الدعم

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

This thread was archived. Please ask a new question if you need help.

A copy of Firefox is already open.

  • 1 (رد واحد)
  • 84 have this problem
  • 2 views
  • آخر ردّ كتبه cor-el

shosty
shosty
more options

I used Spotlight and removed (⌘ + Del and then "Empty Trash") all instances (files and folders) of Mozilla from my Mac to reinstall Firefox. Every time I reopen keep getting this error "A copy of Firefox is already open." I've done some Google searches to find some help, and it seems that it's been easily solved by removing a ".parentlock file." However, since I deleted all folders containing either "Mozilla" or "Firefox," I cannot find a ".parentlock" file even using ls -la and OnyX. Please help.

I used Spotlight and removed (⌘ + Del and then "Empty Trash") all instances (files and folders) of Mozilla from my Mac to reinstall Firefox. Every time I reopen keep getting this error "A copy of Firefox is already open." I've done some Google searches to find some help, and it seems that it's been easily solved by removing a ".parentlock file." However, since I deleted all folders containing either "Mozilla" or "Firefox," I cannot find a ".parentlock" file even using ls -la and OnyX. Please help.

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

You also get that error if you removed the Firefox Profile Folder and left the file profiles.ini

See:

http://kb.mozillazine.org/Recovering_a_missing_profile
http://kb.mozillazine.org/Profile_in_use