Further testing, other DoH providers are also blocked. ``` $ dig +short dns.google 90.207.238.183 $ dig +short dns.nextdns.io 90.207.238.183 $ dig +short doh.powerdns.org 90.207.238.183 $ dig +short dns.quad9.net 90.207.238.183 ``` However, https://1.1.1.1/dns-query (Cloudflare's non-Mozilla offering) works fine.
Bug 1656895 Comment 10 Edit History
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Further testing, other DoH providers are also blocked. ``` $ dig +short dns.google 90.207.238.183 $ dig +short dns.nextdns.io 90.207.238.183 $ dig +short doh.powerdns.org 90.207.238.183 $ dig +short dns.quad9.net 90.207.238.183 ``` However, https://1.1.1.1/dns-query (Cloudflare's non-Mozilla offering) works fine and can be set using the custom option in Firefox.