Is this update why I got the 'Refresh or safe mode' dialog? I foolishly clicked and now I'm trying to restore stuff from the 'Old Firefox data' directory. This was not nice, I started thinking I was getting hacked. Esp. when it asked me for the master password five times in a row. Man is this browser rough.

It should import from the previous release, so try reverting to 85 and upgrading through the intermediate versions.

I fixed it by making my old profile the default in about:profiles

It's weird that a new profile was created in the first place.