.css() function broken on this site. 3 questions now

This .css() question is broken, too.

Your code so far


<script>
$(document).ready(function() {
  $("#target1").css("color", "red");
  $("#target1").prop("disabled", true);
  $("#target4").remove();
  $("#target2").appendTo("#right-well");
  $("#target5").clone().appendTo("#left-well");
  $("#target1").parent().css("background-color", "red");
  $("#right-well").children().css("color", "orange");
});
</script>

<!-- Only change code above this line. -->

<div class="container-fluid">
<h3 class="text-primary text-center">jQuery Playground</h3>
<div class="row">
  <div class="col-xs-6">
    <h4>#left-well</h4>
    <div class="well" id="left-well">
      <button class="btn btn-default target" id="target1">#target1</button>
      <button class="btn btn-default target" id="target2">#target2</button>
      <button class="btn btn-default target" id="target3">#target3</button>
    </div>
  </div>
  <div class="col-xs-6">
    <h4>#right-well</h4>
    <div class="well" id="right-well">
      <button class="btn btn-default target" id="target4">#target4</button>
      <button class="btn btn-default target" id="target5">#target5</button>
      <button class="btn btn-default target" id="target6">#target6</button>
    </div>
  </div>
</div>
</div>

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:77.0) Gecko/20100101 Firefox/77.0.

Challenge: Target the Children of an Element Using jQuery

Link to the challenge:

Nothing in Firefox worked. Switched to chrome and it worked 1st try.