I'm confused about this. I've been running the sept 11 Nightly and it has retina support. Did they take it out, and this is just about re-adding it? Prior to t

I'm confused about this. I've been running the sept 11 Nightly and it has retina support. Did they take it out, and this is just about re-adding it? Prior to that I used the "retinizer" app and the about:config hack to disable acceleration, but performance was really bad. Since running nightly, it has been fully retina enabled and smooth.