Firebase Local Emulator Suite

The emulator suite runs Firebase services on localhost so you can develop and test without touching production. Every product you ship should have its local equivalent running here — it pays back the setup time within a week.

Minimum viable example

npx -y firebase-tools@latest init emulators
npx -y firebase-tools@latest emulators:start --import=./seed-data --export-on-exit

import firestore from "@react-native-firebase/firestore";

if (__DEV__) firestore().useEmulator("127.0.0.1", 8080);

emulators:start with --export-on-exit means your seed data persists between runs. --import loads it on startup so every dev day starts from the same fixtures.