94.1k
Puppeteer
A Node library providing a high-level API to control headless Chrome or Firefox browsers over the DevTools Protocol.
👨💻
Development🧪
Testing🔌
Browser Extension🟡
JavaScript
Best Open-Source Browser Extension Tools in 2026
A curated list of the best, top, and most popular open-source browser extension tools available right now. Showing the top 16 of 16 browser extension tools in our directory, ranked by GitHub stars.
- 30.9k
WebTorrent
⚡️ A powerful streaming torrent client that allows seamless streaming of torrents on the web.
👨💻 Development🔌 Browser Extension🌐 Web - 22.1k
Brave Browser
A secure and fast web browser for Android, iOS, Linux, macOS, and Windows, with privacy features.
🌐 Web🔒 Security🔌 Browser Extension - 20.4k
Neko
A self-hosted virtual browser that runs in Docker, leveraging WebRTC for video streaming and remote collaboration.
🏠 Self-Hosted🌐 Web🛠️ Tools🔌 Browser Extension - 16.9k
FreeTube
An open-source YouTube client focused on privacy, allowing users to watch YouTube videos without being tracked.
🔌 Browser Extension🛠️ Tools🏠 Self-Hosted - 13.0k
MetaMask Extension
The MetaMask browser extension is a user-friendly crypto wallet facilitating secure interaction with Ethereum blockchain-enabled sites, decentralized applications (dApps), and Web3 projects directly from your browser.
⛓️ Web3 & Blockchain🔌 Browser Extension🔒 Security🌐 Web - 12.7k
Plasmo
The Browser Extension Framework for building, developing, and deploying modern, feature-rich browser extensions efficiently.
🧰 Framework🔌 Browser Extension👨💻 Development - 12.6k
Bitwarden Client Apps
Bitwarden client applications for web, browser extension, desktop, and CLI offering secure vault access and password management.
🔒 Security🔌 Browser Extension💻 Desktop🌐 Web - 12.2k
BrowserSync
A tool to keep multiple browsers and devices in sync while building websites. Enables live reloading and synchronization across different devices.
👨💻 Development🛠️ Tools🏎️ Performance🔌 Browser Extension - 9.6k
Wxt
⚡ Next-gen Web Extension Framework for building modern web extensions with ease and efficiency.
👨💻 Development🧰 Framework🔌 Browser Extension🛠️ Tools - 7.0k
Supercookie
Browser fingerprinting via favicon to identify and track users even in incognito mode or after clearing cookies. Demonstrates advanced tracking techniques in browsers posing privacy implications.
🔒 Security🌐 Web🔌 Browser Extension📊 Analytics - 6.5k
Stagewise
stagewise is an innovative frontend coding agent designed to work seamlessly with existing production-grade web apps. It operates within your browser, allowing for direct code changes in your local codebase, and is compatible with all frameworks and setups.
👨💻 Development🛠️ Tools🌐 Web🔌 Browser Extension Our Newsletter
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- 2.8k
Amurex
Amurex is the world's first AI meeting copilot, acting as an invisible companion for both work and life, enhancing productivity.
🤖 AI⚡ Productivity🌐 Web🔌 Browser Extension - 1.9k
Notte
🔥 Reliable browser using agents, providing a secure and efficient browsing experience with enhanced privacy features.
🔌 Browser Extension🔒 Security🌐 Web - 1.4k
Awesome WebExtensions
A curated list of awesome resources for browser extension development, including tools, libraries, and documentation.
🕶️ Awesome🔌 Browser Extension👨💻 Development - 625
Get-cookies.txt-LOCALLY
A privacy-focused tool to retrieve cookies.txt without sending information outside.
🔒 Security🔌 Browser Extension🛠️ Tools
Frequently asked questions
What is the best open-source browser extension tool in 2026?
Puppeteer is the most popular by GitHub stars right now. A Node library providing a high-level API to control headless Chrome or Firefox browsers over the DevTools Protocol.
Are these browser extension tools free?
Yes. Every tool on this list is open source and free to use in your own projects. Many can be self-hosted.
How is this list ranked?
Tools are ranked by GitHub star count, a strong proxy for community adoption and active maintenance. Star counts are refreshed regularly.
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