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

parentInstance: Instance | Container,
    instance: Instance | TextInstance,
  ) {
    if (instance.nodeType === 1) {
      warnForDeletedHydratableElement(parentInstance, (instance: any));
    } else {
      warnForDeletedHydratableText(parentInstance, (instance: any));
    }
  },
  didNotFindHydratableInstance(
    parentInstance: Instance | Container,
    type: string,
    props: Props,
  ) {
    warnForInsertedHydratedElement(parentInstance, type, props);
  },
  didNotFindHydratableTextInstance(
    parentInstance: Instance | Container,
    text: string,
  ) {
    warnForInsertedHydratedText(parentInstance, text);
  },
  scheduleDeferredCallback: ReactDOMFrameScheduling.rIC,
  useSyncScheduling: !ReactDOMFeatureFlags.fiberAsyncScheduling,
});
ReactGenericBatching.injection.injectFiberBatchedUpdates(
  DOMRenderer.batchedUpdates,
);
var warnedAboutHydrateAPI = false;
function renderSubtreeIntoContainer(