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

I cannot open a firefox browser on my computer.

  • 2 پاسخ
  • 1 has this problem
  • 7 views
  • آخرین پاسخ توسّط cor-el

more options

Every time I try to open Mozilla Firefox, an error text box appears. It says, "Profile Missing: Your Firefox profile cannot be loaded. It may be missing or inaccessible." I tried reinstalling Firefox, but I do not know how to fix the problem.

Every time I try to open Mozilla Firefox, an error text box appears. It says, "Profile Missing: Your Firefox profile cannot be loaded. It may be missing or inaccessible." I tried reinstalling Firefox, but I do not know how to fix the problem.

All Replies (2)

more options

Here is a picture of the error message.

more options

You need to locate the profiles.ini file or use the Profile Manager to create a new profile.

See:


This is usually caused by a problem with the profiles.ini file.

You can use one of these to make Firefox create a new default profile or reuse an existing profile:

  • Delete the profiles.ini file to force Firefox to create a new default profile
  • Use the Profile Manager to create a new profile
    If you still have an existing profile then click "Choose Folder" in the PM and select the location of a lost profile and recover this profile.

You should find the profiles.ini file in this hidden location:

  • Windows: %AppData%\Mozilla\Firefox\
    *C:\Users\<user>\AppData\Roaming\Mozilla\Firefox\
  • Mac: ~/Library/Application Support/Firefox/
  • Linux: ~/.mozilla/firefox/

If clearing the profiles.ini file isn't working then also check the location of the cache files.

  • Windows: *C:\Users\<user>\AppData\Local\Mozilla\Firefox\Profiles\<profile>\
  • Mac: ~/Library/Caches/Firefox/Profiles/
  • Linux:~/.cache/mozilla/firefox/