title: Javascript, programmatically trigger file download in firefox
body: <p>I have a data uri in memory that I would like the user to download.</p>
  
  <p>This fiddle works in chrome but not FF: <a href="http://jsfiddle.net/6W2TY/">http://jsfiddle.net/6W2TY/</a></p>
  
  <p>When you click run it will download the tiny image in chrome and do nothing in FF.  Can anyone help me understand why it doesn't work in FF and what I need to do to make it work?</p>
  
  <p>Thanks!</p>