<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Hello World!</title>
    <script type="text/javascript" src="../Build/Cesium/Cesium.js"></script>
    <style>
      @import url(../Build/Cesium/Widgets/CesiumWidget/CesiumWidget.css);
      body {
        padding: 0;
        margin: 0;
        overflow: hidden;
      }
    </style>
  </head>
<body>
  <div id="cesiumContainer"></div>
  <script>
    var cesiumWidget = new Cesium.CesiumWidget('cesiumContainer');
  </script>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
  <title>Hello World!</title>
  <script type="text/javascript" src="../Build/Cesium/Cesium.js"></script>
  <style>
      @import url(../Build/Cesium/Widgets/CesiumWidget/CesiumWidget.css);

      #cesiumContainer {
          position: absolute;
          top: 0;
          left: 0;
          height: 100%;
          width: 100%;
          margin: 0;
          overflow: hidden;
          padding: 0;
          font-family: sans-serif;
      }

      body {
          padding: 0;
          margin: 0;
          overflow: hidden;
      }
  </style>
</head>
<body>
  <div id="cesiumContainer"></div>
  <script>
    var cesiumWidget = new Cesium.CesiumWidget('cesiumContainer');
  </script>
</body>
</html>
Fix Hello World in Firefox.
Fix Hello World in Firefox.

The Cesium container div had no styling.
