[tor-talk] how to make firefox transmit dns query to tor

[esolve esolve]

Hi,

   I'm using firefox with Tor for some tests work( can't use TBB because it
doesn't allow me to keep cookies the next time it opens). I set the firefox
proxy port to 9050, so firefox is using Tor for network access, however,
DNS queries are bypassing the proxy. How can I make the DNS query transit
the tor network, as TBB does.  How TBB make the DNS query enter the Tor
network?