samples/experimental/web_dashboard/web/firebase_init.js

// Your web app's Firebase configuration
var firebaseConfig = {
    apiKey: "",
    authDomain: "",
    databaseURL: "",
    projectId: "<YOUR_PROJECT_ID>",
    storageBucket: "",
    messagingSenderId: "",
    appId: ""
};
// Initialize Firebase
firebase.initializeApp(firebaseConfig);