yahoo help line? promises, promises?

Firefox does NOT work properly in Yahoo!, but when I switch back to I.Explorer ?fine. Done all the recommended b***t from the help line, are they in cahoots with each other? or is it a flaw in the coding. I am fed up of retyping my ..................@ yahoo.......the remember my I.D. simply does not work!!!!!!!!!!!!!! any real help would be appreciated, as I am about to change my service provider if a real cure cannot be found. I want to change to linux eventually to get out of M.S. stranglehold on free choice o.sys, but every which way I try it, yes you guessed it, everyone seems to have cowed under to the imperial rip off corp'. is there still a free choice, or are we stuck with another rip off from M.S. forever?.