I had freeBSD. I just didnt work out. I burned it correctly like I do with all my other linux stuff ( i know, BSD is unix) but It just stops on the second cd and makes strange sounds. I've given up hope and just moved on to Connectiva.
Notice from qwijibow: moved to the BSD section, you will probably got more relevant help here.
Just do a google search for firefox tweaks. There are all kinds of tweaks in the about:config. It is especially great if you have broadband because the changes in there mostly only make a difference in broadband.