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Is the canary domain to signal DoH acceptance still working?

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Elena CCNA
Elena CCNA
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Hello,

I have read many times the entry in https://support.mozilla.org/en-US/kb/canary-domain-use-application-dnsnet and I as well have browsed different forums regarding the topic.

I understand by the documentation that Firefox might use the canary domain use-application-dns.net and we, as a company can signal Firefox if our network is suitable or not for DoH traffic (and thus, establishing ECH).

So we are about to prepare our network for this specific DNS response, but after days of testing, I have not seen a single time any request towards the aforesaid domain.

In the forums I have browsed, I see comments of people reporting this domain appearing in their networks, but these comments are somehow old (2023). My question is simple: is Firefox still using the canary domain use-application-dns.net? if not, are there any plans to reactivate it? if yes, why I don't see a single request towards it? (firefox is set up by default, with no manually setting, as per the documentation the canary domain will only be targeted if there is no manual DoH set up).

Thank you,

Elena

Hello, I have read many times the entry in https://support.mozilla.org/en-US/kb/canary-domain-use-application-dnsnet and I as well have browsed different forums regarding the topic. I understand by the documentation that Firefox might use the canary domain use-application-dns.net and we, as a company can signal Firefox if our network is suitable or not for DoH traffic (and thus, establishing ECH). So we are about to prepare our network for this specific DNS response, but after days of testing, I have not seen a single time any request towards the aforesaid domain. In the forums I have browsed, I see comments of people reporting this domain appearing in their networks, but these comments are somehow old (2023). My question is simple: is Firefox still using the canary domain use-application-dns.net? if not, are there any plans to reactivate it? if yes, why I don't see a single request towards it? (firefox is set up by default, with no manually setting, as per the documentation the canary domain will only be targeted if there is no manual DoH set up). Thank you, Elena