title: how to select which browser to open by sublime text 3
body: <p>I've set  " chrome " to be a default browser . In some case , I have to preview a code with firefox, 
  but for sublime text 3 , once choose " open in browser , the default browser will call.
  Would it be possible to setup the sublime text 3 to open the others browser preview ( firefox )instead of the default browser ?</p>