The default location for Firefox’s profile folder differs depending on your platform. Or, if you have a customization that requires you to find your profile folder, you’ll need to go hunting. If you ever run into any problems with Firefox, trying a new profile can help you troubleshoot. All this information is stored in a profile folder that keeps your data separate from the Firefox program, so if anything goes wrong with Firefox, your information is preserved.
Your Firefox profile stores your settings and personal information, such as your home page, bookmarks, extensions (add-ons), toolbars, and saved passwords.
