Mozilla Firefox is still not compatible with the retina display on the new Apple MacBook Pro laptops.
Apple updated their Safari in time for the launch. Google updated Chrome a few days after the launch.
Firefox users on the other hand are still suffering with a less than spectacular user experience on their newly purchased MacBook Air.
Latest reports say that the support for Retina (HiDPI) display should arrive soon in the Aurora builds.
This means that the stable edition users could have to wait till January next year for the same updates.
Google Chrome on Retina is not perfect as well. Google continues to roll out updates with improvements.