title: Plugin Facebook like doesn't appear in Firefox
body: <p>For some time now, I realized that the Facebook plugin for likes is no longer showing on the page, as if I didn't have such a thing. This only happens in Firefox. The strange thing is that in other major browsers, all of them updated, the information is correctly shown.</p>
  
  <p>Has anything been changed? Does it work for you?</p>
  
  <p>Thank you very much.</p>
  
  <p>PS I have also tested it in a blank page (thinking it might be a css problem). Even in this case, without css, it still doesn't work in Firefox.</p>
  
  <pre><code>&lt;body&gt;
  &lt;div id="fb-root"&gt;&lt;/div&gt;
  &lt;script&gt;
  (function(d, s, id) {
     var js, fjs = d.getElementsByTagName(s)[0];
     if (d.getElementById(id)) return;
     js = d.createElement(s);
     js.id = id;
     js.src = "//connect.facebook.net/ro_RO/sdk.js#xfbml=1&amp;version=v2.3";
     fjs.parentNode.insertBefore(js, fjs);
    }  (document, 'script', 'facebook-jssdk'));
  &lt;/script&gt;
  ...
  ...
  &lt;div id="facebook"&gt; 
   &lt;div class="fb-like" data-href=https://my_page data-layout="button_count" data-action="like" data-show-faces="true" data-share="true"&gt;&lt;/div&gt;
  &lt;/div&gt;
  ...
  ...
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>