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!

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

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

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

Firefox Profile cannot be loaded

  • 3 replies
  • 8 have this problem
  • 1 view
  • Last reply by cor-el

SWengr
SWengr
more options

My old version of Firefox would not launch, so I installed v 10.

Now I get a message that Firefox Profile cannot be loaded.

I uninstalled Firefox and re-installed but I still get the error message and it will not launch.

I am running Windows 7 64 bit Professional

My old version of Firefox would not launch, so I installed v 10. Now I get a message that Firefox Profile cannot be loaded. I uninstalled Firefox and re-installed but I still get the error message and it will not launch. I am running Windows 7 64 bit Professional

Chosen solution

Did you try to start Firefox with this command (use the quotes and leave a space before the -P)? 

"C:\Program Files\Mozilla Firefox\firefox.exe" -P

You can also try to remove the profiles.ini file to force Firefox to create a new default profile.

Read this answer in context 👍 0

All Replies (3)

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

Create a new profile as a test to check if your current profile is causing the problems.

See "Basic Troubleshooting: Make a new profile":

There may be extensions and plugins installed by default in a new profile, so check that in "Tools > Add-ons > Extensions & Plugins" in case there are still problems.

If that new profile works then you can transfer some files from the old profile to that new profile, but be careful not to copy corrupted files.

See:

SWengr
SWengr Question owner
more options

Thanks for the tip, but Firefox will not launch, so I cannot use it to create a new profile.

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

Chosen Solution

Did you try to start Firefox with this command (use the quotes and leave a space before the -P)? 

"C:\Program Files\Mozilla Firefox\firefox.exe" -P

You can also try to remove the profiles.ini file to force Firefox to create a new default profile.