Chrome Browser Extension Development (API + Supabase Backend)

A full-stack Chrome Extension with secure OAuth2 sign-in and a Supabase backend, built to serve multiple organizations from one clean, fast codebase.

The client needed a Chrome Extension that could log users in securely, pull live data from their APIs and keep everything in sync between the browser and the backend. It also had to work for several organizations at once without separate builds for each. We designed and built the whole thing, from the popup UI to the serverless backend.

Browser extensions run in a tricky environment. They're exposed on the user's machine, so security has to be handled carefully. The client needed an extension that:

Handled full OAuth2 login, logout and token refresh without breaking the user flow

Never exposed API keys or credentials inside the extension itself

Served multiple organizations (tenants) securely from a single codebase

Felt fast and modern, with instant feedback on every action

Followed Chrome's Manifest V3 rules and was ready for production

We built a complete OAuth2 flow inside the extension, covering sign-in, access tokens and automatic refresh. Users log in once and stay connected, while expired sessions are renewed quietly in the background.

All sensitive work happens on the server. Supabase Edge Functions handle token exchanges and act as a secure proxy for API calls, so credentials stay server-side and never ship inside the extension.

Each session is checked against tenant-based access rules, with dynamic environment switching. This lets one extension serve many organizations safely, without duplicating code or maintaining separate versions.

We designed a glassmorphic popup interface with responsive fields, smooth transitions and real-time status updates. Login, logout and refresh all update instantly, with no page reloads.

We tested across multiple tenant deployments with real-time debugging and QA checks, making sure auth, data sync and edge cases all behaved reliably before launch.

OAuth2 sign-in – secure login, logout and automatic token refresh

Server-side API proxy – credentials and keys never leave the backend

Multi-tenant support – one extension serving multiple organizations

Live data sync – fetches and syncs data through REST endpoints in real time

Instant UI updates – real-time status with no reloads

Manifest V3 ready – built to Chrome's latest extension standards

Frontend: Manifest V3, React, Tailwind CSS and Chrome APIs

Backend: Supabase Auth, Database and Edge Functions

Security: OAuth2 flows, access tokens and refresh handling

Testing: Multi-tenant deployments, real-time debugging and QA validation

Lightweight, enterprise-ready extension ready for production

Secure authentication with all credentials kept server-side

One codebase serving multiple organizations

Fast, smooth user experience with real-time updates

The client now has a Chrome Extension that's secure, fast and built to scale. It authenticates users, pulls live data and keeps the browser and backend in sync, all from a single codebase that's easy to grow with new organizations and features.