title: outerwidth and width returns wrong value in firefox relative to chrome
body: <p>I'm trying to get the width of an element using <code>element.outerWidth</code>. When I'm using Chrome it returns a correct value, but when I'm switching to firefox I got a much lower value. In what way does firefox read this element different from chrome?</p>
  
  <p>Element:</p>
  
  <pre><code>&lt;div class="submit_container"&gt;
       &lt;input type="submit" value="Something" /&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Chrome: 88px<br>
  Firefox: 36px</p>
  
  <p>When I inspect the element using firefox it display the same with as in chrome. (88px)</p>