Tell me this sounds familiar: You updated to Firefox 133, didn't like it, and installed Firefox 132. Then Firefox 132 told you it needed to create a new profile because the other profile was used in a later version of Firefox. Does that sound right? If you were previously using Firefox Sync, then signing in Firefox 132 to your Mozilla Account should retrieve your Sync data, such as bookmarks, saved logins, etc. Does that seem to be happening, or were you not using Sync?