Opera browser natively supports DNS-Over-HTTPs. Let's configure ControlD on it.
Go to "Settings" in the top left corner menu.
Search for "DNS" in the top right search box
Select "Enter custom DNS server address" option.
Input the DNS-Over-HTTPS URL into the field. If you're configuring our free DNS resolvers, you can use these:
If you are configuring a custom DNS resolver, you can find your DoH URL in the My Account section.