On desktop-firefox, there are profiles in about:profiles and now there is a new
entry in the menu with profiles but these profiles don’t show up in
about:profiles and the menu-profiles are like a sub profile of
about:profiles-profile. I can find this
https://blog.mozilla.org/en/firefox/profile-management/
[https://blog.mozilla.org/en/firefox/profile-management/] but I can’t find
anything regarding the differentiation of them and are the old
about:profiles-profiles going to be discontinued? what is the difference?
These new profiles that can be accessed through menu are not exactly sub-profiles, but I think more like sibling-profiles forming a profile group. Profiles in the same group know about each other, so in the UI you can switch between them and I think there are some settings that can be shared between the profiles in the same group.
I don’t know of any plans to deprecate the old profile system, nor about:profiles for managing them.
Thx