I've been using what I gather is an "older" profiles system via about:profiles.
Now if I go to about:profiles and open my second profile in another window, close it, and then open about:profiles again in first window, I get "Another copy of Firefox has made changes to profiles. You must restart Firefox before making more changes."
This happens every single time, even though I've made zero changes to profiles, and is extremely annoying.
Can/should I migrate my profiles to the new profile manager? How to do this?
