Universal standard for creating browser extensions.
Working through a W3C charter group, Mozilla has partnered with Microsoft and Opera to define a browser extension API that works across multiple browsers.
There is currently a preliminary specification that matches what Google has implemented in Chrome so that extensions written to the specification could potentially work on Chrome, Edge, Opera and Firefox.
🥗 All-in-one professional pop-up dictionary and page translator which supports multiple search modes, page translations, new word notebook and PDF selection searching.
Bitwarden client apps (web, browser extension, desktop, and cli).
☁️ Sync your bookmarks privately across browsers and devices
A Vim-like interface for Firefox, inspired by Vimperator/Pentadactyl.
The cross-browser extension framework.
Authenticator generates 2-Step Verification codes in your browser.
A keyboard shortcut browser extension for keyboard-based navigation and tab operations with an advanced omnibar
Open YouTube / Video browser-extension [top~1] Enrich your experience&choice!🧰250+tweaks; smart features📌set&forget📌 - Longest-standing. Join🧩us?👨👩👧👧 ⋮ {playback|discovery|extra player buttons|quality|codec|full tab|full screen|no distraction|shorts}
ScriptCat, a browser extension that can execute userscript; 脚本猫，一个可以执行用户脚本的浏览器扩展
A browser extension that redirects popular sites to alternative privacy friendly frontends
Privacy Badger is a browser extension that automatically learns to block hidden trackers
Open Source record and playback test automation for the web.
Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs that preserve your privacy. Cookies are separated by container, allowing you to use the web with multiple identities or accounts simultaneously.
A command line tool to help build, run, and test web extensions
Scrobble music all around the web!
A beautiful, customisable New Tab page for Firefox, Chrome, and Edge.
Firefox/Chrome browser extension. SmartProxy will automatically enable/disable proxy for the sites you visit, based on customizable patterns.
拯救B站的弹幕体验！
Created by Browser Extension Community Group
Released May 7, 2015