I got a popup when I opened a new window asking if I want to try out a build in VPN and I logged in to my Google account and after that it did a thing I wasn't expecting, it almost reset my browser but I left another Firefox window open and my data was still there and when I open Firefox my data wasn't there only my account which basally meant from guessing when I login to a Google account it created a completely new profile and mistaken it as the main one then hidden my old one to a point where I think it could get deleted if I close my old profile's window also because I checked profiles and there was only one on all the windows.

Oh and I was trying to export my browser data on the old profile but I didn't found a option, and I tried seeing what the sync feature does and I think when I actually added an account Firefox somehow changed it's mind and now thinks this is a different device or whatever because one of the things in the Connected Services says "Elbey (my username) Firefox on elbey" then another said "Firefox 149, Linux" which these two sound like my devices also because I tried out the sync feature on my old profile and needed to login and it actually worked without doing unexpected stuff which is also how I got this information.