Dans le Google Play Store </ignore>Firefox Installer Nightly for Developers

Ouvrir Firefox Nightly et saisir about:config dans la barre d'adresse URL. Modifier ensuite la valeur suivante :

network.trr.mode = 3

Les valeurs suivantes sont possibles :

0 - Default value in standard Firefox installations (currently is 5, which means DoH is disabled)
1 - DoH is enabled, but Firefox picks if it uses DoH or regular DNS based on which returns faster query responses
2 - DoH is enabled, and regular DNS works as a backup
3 - DoH is enabled, and regular DNS is disabled
5 - DoH is disabled

network.trr.uri = https://cloudflare-dns.com/dns-query

D'autres serveurs DoH possibles sont in sur Wikipedia.