Third-party fonts filter leaves portableapps.com unreadable. It works fine with the following exceptions:
@@||fonts.gstatic.com^$domain=portableapps.com
@@||fonts.googleapis.com/css?$domain=portableapps.com
portableapps.com [third-party fonts]
http://portableapps.com/apps/accessibil ... m-portable seems okay in Firefox, completely readable.