The looks like what is described in this cairo bug. #707288: Causes Firefox to render blurry text http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=707288
A upstream fix for that bug was mentioned in the bug report http://cgit.freedesktop.org/cairo/commit/?id=41bef0fc385381b8c6b9091ec7ca2abe04cfc147 but there has been no mention if it will (or can) show up in Debian soon. -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org