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

version: ReactVersion,
});
if (__DEV__) {
  if (
    !foundDevTools &&
    ExecutionEnvironment.canUseDOM &&
    window.top === window.self
  ) {
    
    if (
      (navigator.userAgent.indexOf('Chrome') > -1 &&
        navigator.userAgent.indexOf('Edge') === -1) ||
      navigator.userAgent.indexOf('Firefox') > -1
    ) {
      var showFileUrlMessage = window.location.protocol.indexOf('http') === -1;
      console.info(
        '%cDownload the React DevTools ' +
          'for a better development experience: ' +
          'https://fb.me/react-devtools' +
          (showFileUrlMessage
            ? '\nYou might need to use a local HTTP server (instead of file://): ' +
                'https://fb.me/react-devtools-faq'
            : ''),
        'font-weight:bold',
      );
    }
  }
}
module.exports = ReactDOMFiber;