Browse free open source Browser Extensions and Plugins and projects for Mac below. Use the toggles on the left to filter open source Browser Extensions and Plugins by OS, license, language, programming language, and project status.
Beautiful, responsive, highly customizable popup boxes
AdGuard browser extension
Cat scratch chrome resource sniffing extension
A universal Sims 4 DLC Unlocker
Chromecast Web Sender SDK implementation for Firefox
Ghostery Browser Extension for Firefox, Chrome, Opera and Edge
Captcha solver extension for humans
Skip YouTube video sponsors (browser extension)
A chrome extension for automating your browser by connecting blocks
A tool to install, manage and use Progressive Web Apps (PWAs)
The Universal Plug-in System. Extend anything with WebAssembly
Allows adding extensions from chrome web store on ungoogled-chromium
DuckDuckGo Privacy Essentials browser extension for Firefox, Chrome
Web Extension for saving a copy of complete web page in a single file
jQuery Validation Plugin library sources
Translate your page in real time using Google or Yandex
Stylus - Userstyles Manager
Offline, privacy-first grammar checker
Automated auditing, performance metrics, & best practices for the web
Scanner detecting the use of JavaScript libraries
uBlock: a fast, lightweight, and lean blocker for Chrome, Firefox
Extension that allows you to intercept and edit HTTP/HTTPS requests
A customizable, modular, responsive, lightbox gallery plugin
The last carousel you'll ever need