This is a bug report.

**Expected Behavior**
React should not suggest me to download the DevTools extension in a `chrome-extension://` page, because the extension has no permission to inject the devtool.

**Actual Behavior**
`Download the React DevTools and use an HTTP server (instead of a file: URL) for a better development experience: https://fb.me/react-devtools`

**Reproducing**

1. Create a Chrome extension with an `option` or `popup` page that uses React
2. Load the extension to Chrome and open up that page.
3. Observe console.

**Version**
Google Chrome 56.0.2924.3
React 15.4.0

'ReactDOM.render(): Invalid component element. Instead of ' +
              'passing a class like Foo, pass React.createElement(Foo) ' +
              'or <Foo />.',
          );
        } else if (element != null && typeof element.props !== 'undefined') {
          
          invariant(
            false,
            'ReactDOM.render(): Invalid component element. This may be ' +
              'caused by unintentionally loading two independent copies ' +
              'of React.',
          );
        } else {
          invariant(false, 'ReactDOM.render(): Invalid component element.');
        }
      }
    }
    return renderSubtreeIntoContainer(
      null,
      element,
      container,
      false,
      callback,
    );
  },
  unstable_renderSubtreeIntoContainer(
    parentComponent: ReactComponent<any, any, any>,
    element: ReactElement<any>,
    containerNode: DOMContainer,
    callback: ?Function,