How to set DoH on Vivaldi

Upgrade your Vivaldi to latest version

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

Go to Settings

Input chrome://settings/security in address bar, it will automatic redirect to vivaldi://settings/security, however, you can't use this URL directly.

Set DNS.SB DoH Server

On Advanced section, enable Use secure DNS, choose with Custom and input:

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