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Profile Missing - Your Firefox profile cannot be loaded. It may be misscing or inaccessible

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Hello, I can't open my Firefox, it says:

Profile Missing - Your Firefox profile cannot be loaded. It may be missing or inaccessible.

I already followed this manual: https://support.mozilla.org/en-US/kb/how-run-firefox-when-profile-missing-inaccessible I changed profiles.iniOLD, and the folder Firefox, but it doesn't work.

Also I tried to acces the User profiles by Mac's Terminal according to this manual: https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles But when I typed the code /Applications/Firefox.app/Contents/MacOS/firefox-bin -P it open's Firefox with the same error: Profile Missing - Your Firefox profile cannot be loaded. It may be misscing or inaccessible

Is there a solution to fix this? I also reinstalled Firefox, but same error.

All Replies (4)

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I assume that you are on Mac. I'm not personally a Mac user myself, but I'll try help you as best as I can.

Make a copy of the profiles.ini file and then open the original file with a plain text editor. File out the file so that it looks like this:

[Profile0] Name={{YOUR_NAME}} IsRelative=1 Path={{MOVE_INFO_BELOW}} Default=1

For the path part of the file, your profile folder should be located in a folder near where the profiles.ini file is saved. Usually there is a Profiles folder and if you open that, your Firefox profile will be saved there. Usually the profile folder is just random text.

So after Path= in the profiles.ini file, you want to put the path that you have to take to find the profile folder.

For example, if you open the Profiles folder and your profile is there and it's called dgfsgfd.default, the path would be Profiles/dgfsgfd.default.

Save the file and then try opening Firefox again.


If that doesn't help, you can try downloading the Profile Manager for Mac. This is just a program that Mozilla discontinued, but you should be able to make a new Firefox profile using it.

Hope this helps.

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Hi Wesley,

Thanks for your effort. Indeed I am a Mac user. I looked in my profiles.ini file and there is this code:

[General] StartWithLastProfile=1

[Profile0] Name=default IsRelative=1 Path=Profiles/vgg4ooxh.default

When I look in the Profiles folder, there is a folder called: vgg4ooxh.default

So I think this is all good.

I also tried the Profile Manager for Mac, but when I open this program it gives a similar error:

Profile Missing Your ProfileManager profile cannot be loaded. It may be missing or inaccessible.

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Hi Did you copy the stuff into the Profile.ini file as was directed by Wesley Branton ?

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Cicero83 said

[Profile0] 
Name=default 
IsRelative=1 
Path=Profiles/vgg4ooxh.default

As Wesley posted, is there no Default=1 line at the end of that Profile in the profiles.ini file? That line is what tells Firefox which Profile to open, and is needed whether you have 1 or multiple Profiles. That line concludes the profile info for the "default" Profile.


If that line is missing - there's your problem. You can edit the profiles.ini file in a simple text app by adding a new line with Default=1. Make sure it is saved as plain text like this:

[General]
StartWithLastProfile=1

[Profile0]
Name=default
IsRelative=1
Path=Profiles/vgg4ooxh.default
Default=1