The firebase env config fo dev is stored in ".env.development" file at project root location with key values set as follows:

REACT_APP_FIREBASE_API_KEY=aSyD25MAIOHgvcu4nvzKUbI REACT_APP_FIREBASE_AUTH_DOMAIN=-.firebaseapp.com REACT_APP_FIREBASE_DATABASE_URL=https://-.firebaseio.com REACT_APP_FIREBASE_PROJECT_ID=-***** REACT_APP_FIREBASE_STORAGE_BUCKET=-.appspot.com REACT_APP_FIREBASE_MESSAGING_SENDER_ID=999999999 REACT_APP_FIREBASE_APP_ID=1:9999999999999:web:****