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

return (
      type === 'textarea' ||
      typeof props.children === 'string' ||
      typeof props.children === 'number' ||
      (typeof props.dangerouslySetInnerHTML === 'object' &&
        props.dangerouslySetInnerHTML !== null &&
        typeof props.dangerouslySetInnerHTML.__html === 'string')
    );
  },
  resetTextContent(domElement: Instance): void {
    domElement.textContent = '';
  },
  shouldDeprioritizeSubtree(type: string, props: Props): boolean {
    return !!props.hidden;
  },
  createTextInstance(
    text: string,
    rootContainerInstance: Container,
    hostContext: HostContext,
    internalInstanceHandle: Object,
  ): TextInstance {
    if (__DEV__) {
      const hostContextDev = ((hostContext: any): HostContextDev);
      validateDOMNesting(null, text, null, hostContextDev.ancestorInfo);
    }
    var textNode: TextInstance = document.createTextNode(text);
    precacheFiberNode(internalInstanceHandle, textNode);
    return textNode;
  },
  commitTextUpdate(