This visual execution compares Supabase and Firebase by listing their main backend features step-by-step. Firebase uses a NoSQL realtime database, authentication, hosting, and cloud functions. Supabase uses a PostgreSQL relational database, realtime listening to database changes, authentication, storage, and edge functions. The execution table shows each feature and its description for both platforms. Variable tracking compares the feature sets side by side. Key moments clarify common confusions about database types, realtime differences, and backend code options. The quiz tests understanding of database types, feature steps, and missing features. The snapshot summarizes the key differences simply.