Yeh expat my firefox has been playing up that badly with error loading crashing - the works that ive gone back to explorer
but i downloaded explorer 7 which has some firefox features of tabbed browsing & no too bad its quite nippy & you can only download it on genuine windows tho im afraid it checks. Sometimes handy having 2 browsers tho.
You need to add/remove progs get rid of firefox download & unistall then you go back onto mozilla site & redownload firefox & any updates.