I've never experienced your page re-load issue, and I browse 100% in firefox. I only check to see that things render in IE as an afterthought these days.
opera sucks also firefox version 1.0 is what i am using
maybe it could be one of my extensions i have installed.. only 2 that i can see effect the webpages would be the lastest adblocker or the googlepreview O_o
i have not changed any settings in firefox since i have installed it O_obut i'll whack the defult button just incase