Built a professional Chrome Extension with secure OAuth2 authentication and Supabase backend integration. The project includes a complete authorization flow, token handling, and dynamic API requests through serverless functions. Designed a modern glassmorphic popup UI with responsive fields, smooth transitions, and real-time status updates. Implemented tenant validation, access control, and session management to ensure reliable multi-environment usage. The backend was structured with Supabase Edge Functions for token exchange and API proxying to keep all credentials secure. Focused on performance, scalability, and clean architecture that simplifies connecting external systems through Chrome Extensions. The result is a lightweight, high-performance extension that authenticates, fetches, and displays data instantly using REST endpoints. It’s optimized for security, clarity, and user experience, combining front-end precision with robust backend automation. Designed, developed, and tested across multiple tenants, this project demonstrates full-stack development capability for Chrome extensions with real OAuth2 and API integrations, ready for enterprise-level deployment.