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

): void {
    if (container.nodeType === COMMENT_NODE) {
      (container.parentNode: any).insertBefore(child, beforeChild);
    } else {
      container.insertBefore(child, beforeChild);
    }
  },
  removeChild(parentInstance: Instance, child: Instance | TextInstance): void {
    parentInstance.removeChild(child);
  },
  removeChildFromContainer(
    container: Container,
    child: Instance | TextInstance,
  ): void {
    if (container.nodeType === COMMENT_NODE) {
      (container.parentNode: any).removeChild(child);
    } else {
      container.removeChild(child);
    }
  },
  canHydrateInstance(
    instance: Instance | TextInstance,
    type: string,
    props: Props,
  ): boolean {
    return (
      instance.nodeType === ELEMENT_NODE &&
      type === instance.nodeName.toLowerCase()
    );
  },