Well, you could add about:profiles to your bookmarks. But I agree that the UX around profiles in FF is a bit clunky.
But containers don't have separate extensions, bookmarks and history so they can't completely replace profiles.
But containers don't have separate extensions, bookmarks and history so they can't completely replace profiles.
So at least until then, about:profiles is no replacement for using the -P command-line switch to start the profile manager.
Using multiple profiles seamlessly is one area Firefox can and should seriously improve, or Chrome's "User" feature will always have the edge.