I recommend using Cloudflare Anycast for the domain relay.firefox.com.

[wutongtaiwan]

Because relay.firefox.com is now banned in China using google anycast, I can't use such a good feature, but cloudflare anycast can be used in China, and cloudflare's privacy protection is very good, and websites deployed on cloudflare can use privacy-protecting features such as ECH, Therefore, it is recommended to transfer the domain relay.firefox.com to Cloudflare

[Jon]

Thanks for submitting an idea to the Mozilla Connect community! Your idea is now open to votes (aka kudos) and comments.

[Filip988]

Providers can be forced to block dns server mozilla should make dynamic dns service to prevent from it being blocked and change dns if it fully blocked in new update we should fight it but its cat and mouse game maybe implement tor