title: How to get the mouse position from 'drag' events in Firefox
body: <p>With "draggable" domNoes, the 'drag' event doesn't seem to contain any mouse information at all (like offsetX and offsetY) like it does in chrome. How can I get this information while dragging?</p>
  
  <p>I've tried setting a 'mousemove' event handler on the document, but it seems like that isn't fired when something is being dragged. Same seems to be true in chrome. What a drag..</p>
  
  <p>I'm using Firefox 30.</p>