title: Can you define your own self-closing tag in HTML5?
body: <p>I have read <a href="https://stackoverflow.com/questions/2802687/is-there-a-way-to-create-your-own-html-tag-in-html5">this</a> topic, but I still have doubts.
  Is there any way to define void tag? </p>
  
  <p>I tried this:</p>
  
  <pre><code>&lt;icon class="home"/&gt; (know that slash isn't obligatory)
  </code></pre>
  
  <p>But, if there is any text content after this tag FF closes them.</p>
  
  <pre><code>&lt;icon class="home"/&gt; Go home
  </code></pre>
  
  <p>Makes</p>
  
  <pre><code>&lt;icon class="home"&gt;Go home&lt;/icon&gt;
  </code></pre>
  
  <p>Should I define somewhere that tag  is void-element? Or is it impossible to do with HTML5?</p>