Fyrd/caniuse — pull request #189 by GeoffYoung (2013-05-14 22:39:57+00:00)
Title: Update firefox support for feature queries

Firefox 21 was released today and doesn't support feature queries by default.
MDN say it won't be turned on until [version 22](https://developer.mozilla.org/en-US/docs/Web/CSS/@supports#Browser_compatibility).