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 DNS over HTTPS on search bar.

Set DNS.SB DoH Server

On Enable DNS over HTTPS using page, choose Increased Protection, choose provider as Custom, and input:

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