Browser Extension Development for Chrome, Edge and Firefox

I design and build browser extensions for Chrome, Edge and Firefox, and I carry the project from a rough idea to a listing that is live in the store. My everyday tools are content scripts that reshape the pages you visit, background service workers that keep logic running while the popup is closed, and tidy popups that trigger everything with a single click. Settings and data go into local and synced storage, so they survive restarts and follow the user between devices.

Most of my work connects the browser to the outside world. I integrate extensions with REST and GraphQL APIs, handle OAuth and token refresh, respect rate limits, and cache responses so the interface stays fast. If your goal is automation, I can watch pages, fill and submit forms, collect structured data, schedule jobs with alarms, and push results to your dashboard or spreadsheet with no manual copy-paste.

I also handle Manifest V3 migration, permission scoping, review-safe code and store moderation, so you get an extension that clears review the first time along with a short guide for future edits.