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Cloudflare ESNI test valid for Firefox?

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Cloudflare provides a web site https://www.cloudflare.com/ssl/encrypted-sni/# which can test Encrytped SNI. My browser is configured in about:config for ECH as follows

network.dns.use_https_rr_as_altsvc true network.dns.echconfig.enabled

When I run cloud flares test I get a failure for ESNI, should this occur?

Cloudflare provides a web site https://www.cloudflare.com/ssl/encrypted-sni/# which can test Encrytped SNI. My browser is configured in about:config for ECH as follows network.dns.use_https_rr_as_altsvc true network.dns.echconfig.enabled When I run cloud flares test I get a failure for ESNI, should this occur?
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This page cites a little more info on that website:

https://fpn.firefox.com/

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