In a blog post today, Mozilla said they were surprised that more than 700,000 users had enabled DoH. in the Firefox release. Before releasing DoH to the U. S. market, they had said they "respect corporate configurations and users' choices about parental control settings."
Mozilla says they will deploy DoH in backup mode, which means that if DoH fails in domain name lookup, Firefox will return and use the operating system default DNS for lookup.
In terms of partner choices, Mozilla tends to use Cloudflare for DoH, because they agree to sign strong privacy agreements, so some Firefox users in the United States will soon use Cloudflare DNS, which may change in the future.
As mentioned above, Firefox allows DoH to be disabled and restored to system-defined DNS. Here we provide information on how to do these operations and show you how to check whether Firefox is using Cloudflare DNS.
First, enable HTTPS over HTTPS, in Firefox stable
1. Start Firefox
two。 Click the menu
In the screenshot above, you can see that the Firefox network settings mention that Cloudflare is the default provider. To reuse the system DNS, you need to disable the "Enable DNS through HTTPS" option mentioned above.
To check whether Firefox is using Cloudflare DNS
When DoH is enabled, visit:Https://188.8.131.52/help
This page displays your connection information, and if you see both the "connected to 184.108.40.206" and "HTTPS-based DNS (DoH)" options are "Yes", your Firefox is using Cloudflare DNS.