Yes, but are calzones a sandwich? Is pizza an open-faced sandwich? Why am I asking these questions?

Yea.

Well, either way, there’s a good chance such a feature gets not-maintained and then deprecated in 1-2 years because that’s just how Mozilla tends to roll.

Mozilla never fails to self-own itself.

Which is unfortunate, because I still rather use Firefox than Chrome/Chromium browsers nowadays, but it would be nice if Mozilla kept its focus on improving Firefox and its tooling rather than features like these that, even under the best of intentions, are very suspect.