Hello, I'm using firefox with a socks 5 proxy, I set network.proxy.socks_remote_dns to true and can confirm the socks request send to proxy server is address is domain not ip resolved. But when I use wireshark to capture dns packet, I still can see dns query of the domain firefox visited send direct. Is firefox resolve domain twice with proxy and direct just like chrome? Are there some settings to turn off this? I test firefox version 24 and 27, both has the same problem, os is windows 7 64bit. related problem: https://support.mozilla.org/en-US/questions/928722 I asked another guy let him use wireshark to check dns leak, same result. I also try set network.dns.disablePrefetch to true and network.prefetch-next to false, no effect. I create a new profile and disable all addon and plugin, no effect. some extend information 1. domain of https link wont leak 2. run test on www.dnsleaktest.com will leak www.dnsleaktest.com 692 6.879564000 192.168.8.188 8.8.8.8 DNS 79 Standard query 0x15ed A www.dnsleaktest.com but wont leak it's subdomain like p3zwu0pq2s.dnsleaktest.com, 9irxt5n4mi.dnsleaktest.com, ...