I am using Firebase with React Native. Firebase shows me a half-time warning, as shown in the screenshot.

I read the following note in the troubleshooting guide .
React Native implements polyfill for WebSockets. These polyfields are initialized as part of the adaptive module that you include in your application through import. React with "respond." If you load another module that requires WebSockets, such as Firebase, be sure to load / require it after response-native:
import React from 'react';
import Firebase from 'firebase';
React Firebase. . . . .
React Native, Android.