title: Firefox allows desktop image files to be dragged in to CKEditor
body: <p>I have an instance of CKEditor running and in Firefox (reproduced in 3.6,4,5) when an image file is dragged from the desktop in to the web app CKEditor text area, it inserts the image data in base64 format.</p>
  
  <pre><code>&lt;img src="data:image/png;base64,iVBORw0KGg...
  </code></pre>
  
  <p>This is causing a misleading experience for my users as they think an image is being uploaded directly in to their post since the image will actually render in the content area. When they go to submit the post it fails, due to either being too large or not passing the content filters we have in place.</p>
  
  <p>Drag and drop isn't in the current scope for the project (and we'd find a better way if it were) so anything that can completely block this behavior would be preferred.</p>
  
  <p>Any ideas?</p>