Mozilla asks people to contribute ideas on "Mozilla Connect", but then chooses to ignore most of the top-rated ideas. To be fair, better tab management is first and third of the list, so they are looking to improve that one. But PWAs is second on the list, and there's no mention of this in their announcement. Bringing back proper PWA support seems to align perfectly with Mozilla's mission, so it blows me away why they aren't actively working on it or talking about it.

The other things mentioned are just features that I would expect to keep improving over time, but are nothing groundbreaking.