title: Log to Firefox Error Console from JavaScript
body: <p>Is it possible to add messages to  the built-in error console of Firefox from JavaScript code running in web pages?</p>
  
  <p>I know that I there's Firebug, which provides a <code>console</code> object and its own error console, but I was looking for a quick fix earlier on and couldn't find anything.</p>
  
  <p>I guess it might not be possible at all, to prevent malicious web pages from spamming the log?</p>