Open source extension projects
Every project in the registry tagged extension, ranked by real GitHub adoption.
A powerful browser extension to create, edit and delete cookies
A High-Fidelity Web Archiving Extension for Chrome and Chromium based browsers!
Improving GitHub's Forks list discoverability through automatic filtering. The project offers an online tool and a Chrome extension.
A Chrome 🌐 & Firefox 🦊 extension to discover the latest developer news and tools in one tab!
Fast, open and free-to-use new tab page for modern browsers
📦 Clients for building books with EpubPress.
A fast image viewer and editor for your browser and desktop
Browser extension that automatically notifies and redirects you to independent wikis.
Related tags
Frequently asked questions
How many open source extension projects are there?
This registry tracks 8 projects tagged extension, with 8,006 GitHub stars between them. The most-adopted is cookie-editor at 1,766 stars.
Are these extension projects free to use?
Yes — 8 of the 8 carry an explicit open-source licence across 5 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which extension project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these extension projects still maintained?
7 of the 8 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.