title: FF 'Responsive Design View' and Retina
body: <p>I like to use Firefox 'Responsive Design View' to emulate multiple mobile devices on my desktop. But I'm in doubt about one thing. </p>
  
  <p>As far as I understand iPhone with Retina use 2 physical pixels per one CSS pixel. And Firefox 'Responsive Design View' do not. That mean that if I want to emulate iPhone 4 screen with resolution 960x640 I actually should use FF RDV preset 480x320 (and add preset 568x320 for iPhone 5). Right?</p>