Exclude the path /__/auth/ from your service worker's caching or intercepting logic. Summary Checklist
Ensure localhost and your production domain (e.g., myapp.com ) are listed. Common Scenarios & Solutions Why it happens
const firebaseConfig = apiKey: "your-api-key", authDomain: "://firebaseapp.com", // This is the missing piece projectId: "your-project-id", storageBucket: "://appspot.com", messagingSenderId: "your-sender-id", appId: "your-app-id" ; // Initialize Firebase firebase.initializeApp(firebaseConfig); Use code with caution. 3. Verify Environmental Variables
