Profiles - Where Firefox stores your bookmarks, passwords and other user data
Firefox stores your personal data and settings in a profile folder. Learn what information it contains and how to find your profile.
Profile Manager - Create, remove or switch Firefox profiles
Firefox stores your personal information and settings in a profile folder. Learn to work with different profiles on Firefox.
How to run Firefox when your profile is missing or inaccessible
How to fix the error ''Your Firefox profile cannot be loaded. It may be missing or inaccessible'' so that you can start and run Firefox.