Valetin, IIRC, the Android team has worried that DoH will increase HTTP request latency and use more battery. We might want to run some performance tests to determine if there actually is any impact. Also, I think some Android devices' system DNS provider uses DoH. On those devices, we might want to offer another setting to use the system DoH provider. I think Chrome does this on desktop.
Bug 1801530 Comment 4 Edit History
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Valetin, IIRC, the Android team has worried that DoH will increase HTTP request latency and use more battery. We might want to run some performance tests to determine if there actually is any impact. Also, I think some Android devices' system DNS providers use DoH. On those devices, we might want to offer another setting to use the system DoH provider. I think Chrome does this on desktop.