I thought Mozilla was the one behind ECH. How is it enabled in Chrome, Edge, and Opera and not in Librewolf, let alone Firefox?
Is this a false negative from https://privacytests.org?
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ECH: Encrypted Client Hello
GPC: Global Privacy Control
I don't really understand these specs on a deep level, so I can't summarize them for you, but these articles should be able to answer any questions you have:
ECH I can sort of see working.
GPC is just won't have any impact without any kind of laws requiering it's use globally woth actual follow ups and punnishments.