title: Error input in form HTML running in the browser Iceweisel (JavaScript)
body: <p>Why is this browser allowing me to type these characters <code>[ ' ~]</code> beyond the numbers ? How can I solve this? </p>
  
  <p>The image of my problem is here: 
  <a href="https://i.stack.imgur.com/Dqi4I.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Dqi4I.png" alt="enter image description here"></a></p>
  
  <p>On Google Chrome this works: </p>
  
  <pre><code>&lt;input type="number" pattern="[0-9]" name="points"&gt;
  </code></pre>
  
  <p>allowing only enter numbers, but iceweisel ( firefox) not.</p>