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I reached out to Mozilla, and they've confirmed that DoH is being enabled by default only for installations inside US.

So, if you are in the EU, Firefox won't switch you to DoH. You can still enable it if you wish, but your DNS queries will reach your local resolver unless you change it.

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> I reached out to Mozilla, and they've confirmed that DoH is being enabled by default only for installations inside US.

How do they know? What is the likelihood of them getting it wrong?

What protections do they have in place for their geo-location, to ensure that they don't leak unnecessary information when determining whether a user is in the U.S. or not?

I was under the impression that it was people with "en_US" locale.

What if you're in UK/CA/AU/NZ and running that particular language variant instead of the "correct" one?

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