daft newbie questions

[Richard Bown <richard.bown@blueyonder.co.uk>]

Hi 
I've taken refuge from Kernel 3.0 and gnome3.
can someone point me to where I can find libdvdcss and the w32/mpeg4
codecs.I can find reference to 32bit, but not amd64
And is firefox in a repo somewhere ?, ice weasle hasn't so opened as the
lock file is set, is that in .mozilla ???

Thanks 

Richard