[Home](./index.md) > [@firebase/app](./app.md) > [FirebaseApp](./app.firebaseapp.md) > [options](./app.firebaseapp.options.md) ## FirebaseApp.options property The (read-only) configuration options for this app. These are the original parameters given in [initializeApp()](./app.initializeapp.md). Signature: ```typescript readonly options: FirebaseOptions; ``` ## Example ```javascript const app = initializeApp(config); console.log(app.options.databaseURL === config.databaseURL); // true ```