Ugly fonts on some websites

[Roberth]

On websites like this forum, 4chan and dagbladet.no, I experience that the fonts look pretty much ugly, I have installed mozilla-fonts, but didn't help, what do I need to do?

[Djn]

I'd install the MS webfonts as well (x11-fonts/webfonts), and perhaps try changing the default fonts in firefox.

[Roberth]

That helped, thanks.