title: white-space not working on Firefox
body: <p>I want the <code>&lt;select&gt;</code> <code>&lt;option&gt;</code>s to wrap if the text is too long.</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="false" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-css lang-css prettyprint-override"><code>select {
    overflow-wrap: break-word;
    word-wrap: break-word;
    white-space: -moz-pre-wrap;
    white-space: pre-wrap;
  }</code></pre>
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;select style="width:130px;"&gt;
    &lt;option value="47" selected="selected"&gt;Traditur Preascep irruit. Sed now possum Non adamare te. Maneam&lt;/option&gt;
  &lt;/select&gt;</code></pre>
  </div>
  </div>
  </p>
  
  <p>But when I test on Firefox, the text is hidden, not wrapped. How to fix this?</p>