#ember-testing-container {
  position: fixed;
  background: white;
  bottom: 0;
  right: 0;
  width: 640px;
  height: 384px;
  overflow: auto;
  z-index: 9999;
  border: 1px solid #ccc;
  transform: translateZ(0);
}
#ember-testing {
  zoom: 50%;
}

#ember-testing-container {
  position: fixed;
  background: white;
  bottom: 0;
  right: 0;
  width: 640px;
  height: 384px;
  overflow: auto;
  z-index: 9999;
  border: 1px solid #ccc;

  /* Prevent leaking position fixed elements outside the testing container */
  transform: translateZ(0);
}
#ember-testing {
  zoom: 50%;
}

Add code comment explaining why the CSS transform is there
Add code comment explaining why the CSS transform is there
