title: NVDA not announcing all text inside a role="alert" on Firefox
body: <p>I have a div with <code>role="alert"</code> added to the DOM when a form is submitted, it contains a <code>h3</code> and a description. At the moment of picking a choice, both texts are announced by VoiceOver (Apple), but using NVDA on Firefox (Win10) only the description text is announced, and the <code>h3</code> text is never heard. What might be the problem here?</p>
  
  <p><a href="https://i.stack.imgur.com/P82I0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/P82I0.png" alt="enter image description here"></a></p>