Looks like AdGuard will soon be taking on NextDNS with a new managed DNS service:
More about it here: https://adguard.com/en/blog/reimagining-adguard-dns.html
Add to the list this open-source adblock test site:
Tests against this list of domains: https://github.com/d3ward/toolz/blob/master/src/d3host.txt
Wrote a Python script that uses doggo under the hood for seeing how effective resolver's filtering is against a list of domains.
Quad9 DNS now has a site for validating if it's enabled or not.
Here’s a way (on iOS 14) of combining a WireGuard VPN with a separate encrypted DNS resolver: install a DNS profile (https://encrypted-dns.party) or app (DNSecure, NextDNS, iVerify) and then remove the DNS server(s) in your WireGuard profile.
Nice, Passepartout now supports using a separate, encrypted DNS resolver with a VPN connection. Using a resolver like NextDNS with a VPN just became a bit easier on iOS.
Looks like PrivateStorage is finally launching later this year.
"PrivateStorage began as a joint venture between Least Authority and Private Internet Access. Together, we facilitated user testing as we investigated improvements to increase the usability of the application. At the end of 2020, the two companies mutually agreed to change their relationship and PrivateStorage is now 100% owned by Least Authority."
“[Mullvad’s] public DNS service (currently in beta) offers DNS over HTTPS (DoH) and DNS over TLS (DoT), with QNAME minimization and basic ad blocking. It has been audited by the security experts at Assured.”
Quad9 is moving to Switzerland:
“The Swiss government produced findings of law that Quad9 is exempt from both law enforcement and intelligence data-collection and retention requirements, as well as KYC.”
- Discussion: https://teddit.net/r/privacytoolsIO/comments/llqd7h/quad9_move_to_switzerland
Blocklist for ScamClub domains:
FYI Mozilla / Firefox shares user data with Google, Leanplum, and Adjust  by default except on Klar  . Learn how to opt-out here . Also doesn't hurt to search for "telemetry" in `about:config` (not available on Firefox iOS) and toggle the entries to `false`.