In Case you missed the comments on #385935
Users of Mullvad VPN and Mullvad Browser can enable the feature to block dangerous and unwanted content such as advertisements, social media, malware, trackers, etc.
If you are NOT using any Mullvad service, you can still block incoming content. All you have to do is change the DNS record in your client. Mullvad describes exactly how to do this in your client on their webpage https://mullvad.net/de/help/dns-over-https-and-dns-over-tls
On Android, go to Settings - Network & Internet - Private DNS and set the hostname you want to use (see the table on Mullvad webpage).