What is the DoH blocker and how can you stop it from sending telemetry?

Modern browsers often enable DoH (DNS-over-HTTPS) by default. While this encrypts your DNS queries, it also redirects them to centralised Google or Cloudflare servers, bypassing your perimeter ad blockers and harvesting hidden usage telemetry.

Enforcing local filtering against DoH

DoH bypasses your operating system's local hosts file. AdBlock Network resolves this at the browser tab level. To safeguard your privacy, it performs asynchronous, read-only requests to multiple independent endpoints, keeping your perimeter firewall active. This intercepts and blocks ad requests at the Address layer locally before the browser attempts to route them through DoH.