Open source browser-extension projects
Every project in the registry tagged browser-extension, ranked by real GitHub adoption.
uBlock Origin - An efficient blocker for Chromium and Firefox. Fast and lean.
:octocat: Browser extension that simplifies the GitHub interface and adds useful features
Quasar Framework - Build high-performance VueJS user interfaces in record time
基于 ChatGPT API 的划词翻译浏览器插件和跨平台桌面端应用 - Browser extension and cross-platform desktop application for translation based on ChatGPT API.
Build AI agents and RPA workflows without writing code
daily.dev is the personalized developer news feed and community. Get the best tech content from all over the web in your browser new tab or on mobile. Free and
Extract and decrypt browser data, supporting multiple data types, runnable on various operating systems (macOS, Windows, Linux).
🧩 The Browser Extension Framework
Integrating ChatGPT into your browser deeply, everything you need is here
Captcha solver extension for humans, available for Chrome, Edge and Firefox
🧡 Browser extension that simplifies finding and subscribing RSS and RSSHub
Blocks specific sites from appearing in Google search results
一款跳过小电视视频中恰饭片段的浏览器插件，移植自 SponsorBlock。A browser extension to skip sponsored segments in videos, ported from the SponsorBlock
Highlight and capture the web in your favorite browser. The official Web Clipper extension for Obsidian.
The cross-browser extension framework.
Debloated fork of the extension "I don't care about cookies"
Browser extension for reverse image search, available for Chrome, Edge and Safari
E 站注射器，将中文翻译注入到 E 站体内
👻 Use your text editor to write in your browser. Everything you type in the editor will be instantly updated in the browser (and vice versa).
A command line tool to help build, run, and test web extensions
Privacy-first password manager with built-in email aliasing. Fully encrypted and self-hostable.
Firefox/Chrome browser extension. SmartProxy will automatically enable/disable proxy for the sites you visit, based on customizable patterns.
💬 Chat with anyone on any website.
BookmarkHub , sync bookmarks across different browsers
The portal to the new, open Internet. ([I:b])
Privacy-focused translation with offline capabilities
Copy AI conversations as clean Markdown Context Bundles — one click from ChatGPT, Claude, Gemini, DeepSeek, Grok & GitHub. Copy from sidebar without opening. Ze
Related tags
Frequently asked questions
How many open source browser-extension projects are there?
This registry tracks 28 projects tagged browser-extension, with 315,568 GitHub stars between them. The most-adopted is uBlock at 67,923 stars.
Are these browser-extension projects free to use?
Yes — 27 of the 28 carry an explicit open-source licence across 6 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 browser-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 browser-extension projects still maintained?
23 of the 28 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.