title: How do I preserve the original img src (disable Data URI) when pasting an image in a Firefox contentEditable div
body: <p>I have an editor which contains a div with contentEditable=true, where I let the user paste images from the clipboard, as well as change the image's SRC attribute from inside the editor.</p>
  
  <p>In IE it's working fine, but in Firefox the image is automatically serialized on paste, i.e. the src attribute becomes something like data:image/png;base64,iVBORw0KGg...</p>
  
  <p>How do I force Firefox to keep the original image source?</p>