ECH flags not found

[soliviantar]

Description

I am trying to enable Encrypted Client Hello on the latest Brave, but the flags are not found in brave://flags, they are gone.

How do I activate it?

Steps to reproduce

1. Go to brave://flags
2. Search for hello or dns
3. Nothing related to ECH is found

Actual result

Nothing is found

Expected result

Appropriate flags are available (see this, for example)

Reproduces how often

Easily reproduced

Desktop Brave version (brave://version info)

1.68.134
Chromium 127.0.6533.88

Android device

• Brand/model: Poco X3 Pro
• Android version: 13

Channel information

• release (stable)
• beta
• nightly

Reproducibility

• with Brave Shields disabled
• with Brave Rewards disabled
• in the latest version of Chrome

Miscellaneous information

No response

[thehouseisonfire]

I'd also like this feature, as both https://tls-ech.dev/ and https://www.cloudflare.com/ssl/encrypted-sni/#results return that ECH is not enabled (Brave 1.69, Arch Linux)

[vanyasem]

Upstream Chromium removed the flag, as the feature is now enabled by default.

However, I'd like to ask whether it would be possible to somehow add the flag back, but for the purposes of disabling ECH altogether?

Russia recently started blocking all ECH-enabled connections, making numerous websites inaccessible: https://adguard-dns.io/en/blog/encrypted-client-hello-misconceptions-future.html

See net4people/bbs#417 for more details

[vanyasem]

Related: #36904