Why is the browser doing its own DNS?
this post was submitted on 17 Sep 2025
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Doesn't this break DNS based ad blocking?
If you mean a DNS sinkhole, like Pi-Hole, then that shouldn't be a problem. Pi-Hole acts as a DNS provider, so:
- It could also act as a DoH provider. Someone seems to have done this for Pi-Hole here: https://discourse.pi-hole.net/t/can-pihole-act-as-a-doh-or-dot-server/56106
- You could disable (or not enable) DoH in Firefox to make regular DNS requests at your Pi-Hole, but then your Pi-Hole can use DoH to forward the DNS requests to outside DoH providers. Pi-Hole seems to support with either cloudflared or dnscrypt-proxy.
On Android, there's also ad blocking solutions that run a VPN server on your device, to terminate certain requests that way. I'm not entirely sure how those work, but if needed, they could presumably also run a DoH provider on your device.
Only if your adblocker doesn't support it. Piehole works just fine.