I love Mozilla's Firefox, but they've got a bad track record of funding things that matter over time. See Thunderbird having to become independent and roll up their own foundation. Mozilla could have had something like OpenAI long ago, but they didn't bother. Instead they bought out Pocket which a lot of loyal users didn't care for. They also stopped maintaining their password manager on iOS (and I'm guessing Android?) which is rather annoying to me, I've been using Firefox's built-in for years, and it was nice to have a PM on iOS. I would have gladly paid money to have it on iOS if it meant it would get funded. There's also their VPN, which is just Mullvad with a skin on it iirc.
Mozilla: It's okay to make products that you sell in order to actually fund your projects properly.
Whoever is managing Firefox (the open source org / corporation, I don't care which) is mismanaging Firefox, and they have been for too long. Mozilla has a lot of potential being burned away. I fear for the day MDN shuts down, since its an invaluable resource when doing front-end web development.