New DNS-Over-Https providers

[Wulkan1]

Is it possible to add new DoW providers to Firefox? I know a few besides the default ones;

• https://dns.adguard.com/dns-query
• https://doh.opendns.com/dns-query
• https://doh.cleanbrowsing.org/doh/security-filter
• https://dns.quad9.net/dns-query

[atomicrobotman]

100% needed.

Such a simple addition.

This needs promoting too. DoH is important (despite the negatives).