How to set DoH on Firefox

Upgrade your Firefox to latest version

Make sure you have installed latest Firefox, or you can download here (opens in a new tab).

Go to Settings

Input about:preferences in address bar and search network on search bar, then click Settings...

Set DNS.SB DoH Server

On Connection Settings page, click Enable DNS over HTTPS, choose Custom on Use Provider, and input the following on Custom:

https://doh.dns.sb/dns-query