I had an annoying problem with firefox while testing my rails code in dev mode. It's so terribly slow! At first, I tried to reinstall mongrel and some stuff to no effect. Until I started looking for answers from the net and came across with this Firefox IPV6 issue.
Initially, I didn't expect FF was the culprit since it's running perfectly well before I tried developing apps on my new Laptop.
Why Bill Gates is Reckoned to be the Greatest Gift to Secular Humanity