I realized that my DNS lookup was slow with Firefox. I played with addresses in resolve.conf but that didn't help. I had previously deleted everything in my hosts file except for the loopback. I caught a forum post about slow DNS resolution with some routers or internet services not supporting IPv6. Going to about:config in the FF address bar, I saw network.dns.disableIPv6 was false. I changed it to "true" and holy fucking shit! Now, Opera is the slow one around here. (...runs off to myopera.com)