title: Setting .innerHTML
body: <p>I am developing a Firefox extension which need to change some values on a specific <code>&lt;div&gt;</code>.</p>
  
  <p>I try to inject this into the DOM by tying this into the URL bar:</p>
  
  <pre><code>javascript:document.getElementById('c4d9b2819218742680841961_input').innerHTML = 'foo'
  </code></pre>
  
  <p>The  value do change but then the whole page become blank quickly expect the <code>&lt;div&gt;</code>.</p>
  
  <p>How can I avoid this? Thanks.</p>