title: Paste option in CKeditor doesnt seem to work in Chrome and firefox
body: <p>Using the online ckeditor <a href="http://sdk.ckeditor.com/samples/classic.html" rel="noreferrer">http://sdk.ckeditor.com/samples/classic.html</a>
  I see the past options (Paste, Paste as plain text and paste from word) doesn't copy from clipboard.
  I gives the error '<strong><em>Your browser does not allow you to paste plain text this way. Press Ctrl+Shift+V to paste</em></strong>.' But it seems to work in IE(it prompts for allow access) and not in Chrome or Firefox.</p>
  
  <p>Is this a bug or some configurations needs to done from browser or ckEditor. Cause I remember I used the same behavior few months back and it used to give a popup to paste you content to the editor. </p>
  
  <p>Thanks,
  Vijai</p>