Right. It only works for dedicated ad domains. In practice, that’s a LOT of ads.
On Android, it’ll block most ads, including full-screen ads, within apps.
In will NOT, however, work with sites like Netflix or Youtube, because those use the same domains for ads as for the actual videos.
Yes, everyone should set up DoH (DNS-over-HTTPS) or DoT (DNS-over-TLS). You can do this at the browser level, like you just did in Firefox, or at the OS level.
You can also block ads this way, by cutting off connections to known ad domains before they even start. Mullvad runs a free ad-blocking DoH server anyone can use. See https://mullvad.net/en/help/dns-over-https-and-dns-over-tls for instructions on how to set that up on your OS.
Firefox has also just announced a built-in VPN, which could help get around other types of ISP-level censorship. That’s probably the only free VPN I’d trust, personally. Mullvad and Proton are well-regarded paid VPNs if you want to go that route.
I have heard 1000x more about those than I’ve heard about this Proton issue, so I don’t think that point is valid. This is thread is actually the first I’m hearing of any lobbying trip.
Also, people specifically choosing products for political/ethical/moral reasons are naturally going to be more sensitive to political/ethical/moral failings.