Hi Yes, this is possible but there are two health warnings: 1) DoH is still being developed and is not officially supported on Firefox for Android and 2) the approach to turn it on is a bit more complex and should be done with great care. In the address bar, type: about:config Search for: Network.trr Look for network.trr.bootstrapAddress and set the address as 1.1.1.1 Look for network.trr.mode and set the value as 3 (to always force DoH) Exit out and you should find that DoH is enabled. Please implement, test and use with care.