title: button disabled prop not working in Firefox
body: <p>I have a button with the "disabled" attribute, that I enable using jQuery when certain conditions are met. The problem is that Firefox doesn't read the "disabled" attribute, even though Chrome&amp;IE have no problem.</p>
  
  <p>My code is <code>&lt;button disabled type="button" class="btn btn-secondary button_confirm" title="Title here"&gt;Confirm&lt;/button&gt;</code></p>
  
  <p>I also tried <code>disabled=true</code> and <code>disabled=disabled</code> but nothing seems to work.</p>
  
  <p>Can anyone please help? Thank you.</p>