Mozilla ?

I want to know could I save my name in forums when I type it in and
then go back to it with out retyping it again like it is in IE6 can
you tell me where I could set this up at in Mozilla and dose it also
go for Web address when I type it in and then go back to it with out
retyping it in again can you explain autocomple to me Thanks

sportman10@lycos.com