Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More
This thread was closed and archived. Please ask a new question if you need help.
Locked Archived

ECH/ESNI doesn't work in FF Nightly

Firefox Bookmarks
niksor21 replied 5 years ago
mario.hubbard
mario.hubbard

Looks like SNI settings via about:config in Nightly don't apply. Nightly version: 90.0a1 (2021-05-24) (64-bit) OS platform: Win 10 pro, 21H1 19043.985

1. network.security.esni.enabled ->true 2. network.dns.echconfig.enabled ->true 3. network.dns.use_https_rr_as_altsvc ->true 4. network.trr.mode -> 2 5. in Network settings DoH is enabled and Cloudflare (default) is selected 6. 1.1.1.1 with WARP is used

Looks like SNI settings via about:config in Nightly don't apply. Nightly version: 90.0a1 (2021-05-24) (64-bit) OS platform: Win 10 pro, 21H1 19043.985 1. network.security.esni.enabled ->true 2. network.dns.echconfig.enabled ->true 3. network.dns.use_https_rr_as_altsvc ->true 4. network.trr.mode -> 2 5. in Network settings DoH is enabled and Cloudflare (default) is selected 6. 1.1.1.1 with WARP is used
Attached screenshots

All Replies (1)

niksor21
niksor21

You can use Firefox Extended Support Release. After the version 85, Firefox does not support ESNI.

You can find more here: https://blog.mozilla.org/security/2021/01/07/encrypted-client-hello-the-future-of-esni-in-firefox/

Modified by niksor21