react-native-firebase/docs/v2/initial-setup.md

Install the library

npm install --save react-native-firebase

Initial Setup

The RNFirebase library is intended on making it easy to work with Firebase and provides a small native shim to the Firebase native code.

To add Firebase to your project, make sure to create a project in the Firebase console

Each platform uses a different setup method after creating the project.

iOS

For iOS, follow the instructions here.

Android

For Android, follow the instructions here.