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Firefox 65 does not use TLS 1.3 nor encrypts SNI. Why?

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Even with these settings Firefox 65 does not use TLS 1.3 nor encrypts SNI. Why?

network.trr.mode = 2 or 3 network.security.esni.enabled = true

Even with these settings Firefox 65 does not use TLS 1.3 nor encrypts SNI. Why? network.trr.mode = 2 or 3 network.security.esni.enabled = true

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The Developer version is working with TLS 1.3

https://www.cloudflare.com/ssl/encrypted-sni/

I can't get the Encrypted SNI to work either, but I know it is working in the Nightly version. It may be an up and coming feature. Or maybe I just need to clear my DNS cache.

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So is this a bug that these do not work on the stable 65 release?

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It's not a bug. It is a feature that is being implemented. It is not considered stable, but a developmental feature. Firefox takes users' security very seriously and will roll out this feature as soon as the developers have fully tested the code.

FWI - You will never be 100 percent secure on the Internet.