title: The "before" pseudo element not working in Font awesome v.5
body: <p>What am I doing wrong?</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>body {
    font-family: arial;
    font-size: 1.5rem;
  }
  
  li.facebook:before {
    content: "\f09a";
    font-family: FontAwesome;
  }
  
  li {
    list-style: none;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;link href="https://use.fontawesome.com/releases/v5.0.1/css/all.css" rel="stylesheet" /&gt;
  &lt;ul&gt;
    &lt;li class="facebook"&gt;123 Drive.&lt;/li&gt;
    &lt;li&gt;&lt;i class="fab fa-twitter-square"&gt;&lt;/i&gt; Twitter&lt;/li&gt;
  &lt;/ul&gt;</code></pre>
  </div>
  </div>
  </p>