message: Abort embedded page load for null URL
diff: @@ -57,6 +57,10 @@ export default class EmbeddedPage extends React.PureComponent {
  componentWillMount() {
  this._unmounted = false;
  + if (!this.props.url) {
  + return;
  + }
  +
  // we use request() to inline the homepage into the react component
  // so that it can inherit CSS and theming easily rather than mess around
  // with iframes and trying to synchronise document.stylesheets.
  