Make create-react-app error screen react less irritating while developing but still viewable

index.css

body > iframe {
  left: auto !important;
  width: 50px !important;
  right: 0 !important;
  border-left: 2px solid red !important;
  opacity: 0.6 !important;
  transition: all 300ms;
}
body > iframe:hover {
  width: 50% !important;
  opacity: 1 !important;
}