what kind of problems that need to be fixed? i use my browser constantly for 10+ hours per day and have never needed anything fixed. other than the occasional crash, and losing my bookmarks from it, i'm problem free on all of them. including IE actually. (i was more annoyed with IE's pop-ups and with the potential security holes in IE)
fwiw, firefox is a beta, and will have some problems. i haven't found them though.
if one does have a problem, i'm sure bruce and his motley crue will be happy to help.