title: What is the default style of the blue focus outline in Chrome?
body: <p>I have a webapp that uses contenteditable div's. I like how they appear in Chrome: when I focus, Chrome displays a nice blue glow around the div. However in Firefox I get an ugly dashed outline. 
  What I observed so far is that Chrome stops displaying its default blue frame once I change the outline of div:focus.
  I'd like to make my app consistently look nice, so my question is </p>
  
  <p>how can I replicate Chrome's default style for <code>div[contenteditable="true"]:focus</code>?</p>