title: Set the Thumbnail Image for Facebook Share Buttons 2016?
body: <p>I'm attempting to set a custom thumbnail for when people share my website on Facebook. I followed this post here: <a href="https://stackoverflow.com/questions/1138460/how-does-facebook-sharer-select-images-and-other-metadata-when-sharing-my-url">How does Facebook Sharer select Images and other metadata when sharing my URL?</a></p>
  
  <p>It seems this info may be outdated because I am unable to get it to work. Can anyone advise if there has been a change and how to handle this now? </p>
  
  <p>I currently have this in my head but It is not working:</p>
  
  <pre><code>&lt;head&gt;
  &lt;meta property="og:image" content="http://placehold.it/350x150"/&gt;
  &lt;meta property="og:image:secure_url" content="https://placehold.it/350x150" /&gt;
  &lt;/head&gt;
  </code></pre>