title: console.log is not working when used in a Firefox, Greasemonkey script
body: <p>My userscript prints some information using <code>console.log()</code>.</p>
  
  <p>This works fine in Chrome, but when I install this userscript in Firefox (Greasemonkey), the  web console in Firefox is not displaying anything.</p>
  
  <p>I searched for a solution and some suggested to use <code>unsafeWindow</code> but it is also not showing any output. Moreover <code>unsafeWindow</code> cannot be used for chrome. I even installed Firebug but it was no use. How can I resolve this?</p>
  
  <p>For example, I tried this userscript in Firefox:</p>
  
  <pre><code>// ==UserScript==
  // @name        console
  // ==UserScript==
  console.log("hello");
  </code></pre>