I recently updated my Fedora Rawhide system, and after doing so, fonts in Firefox (now 31) are ugly. But... not all of them. I traced it down to some fonts being rendered as "Helvetica" (the element inspector in Firefox tells me so), and this being rendered with no anti-aliasing.
I don't think there is an open-source Helvetica, so something is being substituted. How can I:
- figure out what font is actually being used,
- discover why it isn't rendered nicely, and
- fix the problem?