monafont on xubuntu firefox

I have apt-get install xfonts-mona but sjis text isn't very nice (the characters are there but off-place). How do I configure firefox to use monafont? edit -> preferences -> content -> fonts, then what?

You won't need to set the fonts, they're forced on for this page in CSS. It might be one of the ttf packages, though, not xfonts.

>>2
thanks, ttf-mona did the trick.