title: Firefox transitions not working
body: <p>This is my CSS setup:</p>
  
  <pre><code>#element1, #element2{
    -webkit-transition: left 0.3s;
    -moz-transition: left 0.3s;
    -o-transition: left 0.3s;
    transition: left 0.3s; 
  }
  
  body.open #element1, body.open #element2 {
     left: 245px; 
   }
  </code></pre>
  
  <p>The problem is that the transition just doesn't work in Firefox, it's fine in all other browsers.</p>