title: Input for numbers allows commas in Firefox
body: <p>I have my code and works perfectly in Chrome, I have an input number and it does not allow to write commas, but the problem is in Firefox, it allows me to write commas.</p>
  <p>This is my code:</p>
  <pre><code>&lt;input
      formControlName=&quot;quantity&quot;
      type=&quot;number&quot;
      matInput
      step=&quot;1&quot;                                
   /&gt;
  </code></pre>
  <p>How can I solve it?</p>