启用 DNS over HTTPS (DoH) / ESNI https://www.ghacks.net/2018/04/02/configure-dns-over-https-in-firefox/ 启用 DoH 之后，远端能被解析时会使用 Trusted Recursive Resolver (TRR) 而忽略本地 hosts network.trr.mode network.trr.uri network.security.esni.enabled
