But that's the only thing I've liked, and they keep killing projects that were genuinely useful and worth paying for (Pocket, Firefox Send).

This has a been a pattern for Mozilla for a long time. I think part of the reason reason is they are trying to find a way to make money that isn't dependent on a search deal with Google. But most of their attempts end up not being something people actually want and/or what they make isn't actually good enough to draw people. But even when they make something decent, like Lockwise and Send, they seem to lose interest and give it up.

That's what I wish they would do too. But, realistically, that stuff doesn't actually pay the bills. How many Firefox users actually pay for it? So I'm not surprised that they're thrashing around trying to find some way to make money beyond Google paying them for the search bar.

Elaborate? it's done nothing but ruin the internet so far. Slop content, search engines are unusable, and now the lowest common denominator simply chatbots a half-baked website and thinks it's good when it isn't.