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.

Skip YouTube video sponsors (browser extension)

• UpdatedNov 1, 2025
• TypeScript

PT 助手 Plus，为 Microsoft Edge、Google Chrome、Firefox 浏览器插件（Web Extensions），主要用于辅助下载 PT 站的种子。

• UpdatedSep 1, 2025
• JavaScript

Browser extension to curate, annotate, and discuss the most valuable content and ideas on the web. As individuals, teams and communities.

• UpdatedMar 25, 2025
• TypeScript

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

• UpdatedNov 5, 2025
• TypeScript

An open-source userscript manager for Safari

• UpdatedAug 31, 2025
• Swift

A Browser Extension for faster reading on ANY website!

• UpdatedJul 16, 2025
• TypeScript

A translation extension.

• UpdatedNov 13, 2023
• JavaScript

Web Extension for sniffing and downloading HTTP Live streams (HLS)

• UpdatedOct 20, 2025
• TypeScript

Web extension to set a default speed for video and audio

• UpdatedNov 6, 2025
• TypeScript

TTV LOL PRO removes most livestream ads from Twitch. This is free, don't expect it to be perfect.

• UpdatedOct 31, 2025
• TypeScript

🛠️ A Vue CLI 3+ preset (previously a Vue CLI 2 boilerplate) for quickly starting a web extension with Vue, Babel, ESLint and more!

• UpdatedMay 3, 2023
• JavaScript

A Firefox extension to protect from being fingerprinted.

• UpdatedSep 28, 2025
• JavaScript

A customizable read mode web extension.

• UpdatedSep 29, 2025
• JavaScript

A set of utilities for building Redux applications in Web Extensions.

• UpdatedFeb 18, 2025
• JavaScript

It makes your existing server live. This is a browser extension that helps you to live reload feature for dynamic content (PHP, Node.js, ASP.NET -- Whatever, it doesn't matter)

• UpdatedDec 25, 2024
• JavaScript

A keyboard interface to the web

• UpdatedNov 7, 2022
• JavaScript

一款可以预防颈椎病的新标签页扩展。

• UpdatedJun 8, 2025
• TypeScript

A browser extension to translate Japanese by hovering over words.

• UpdatedNov 5, 2025
• TypeScript

Chrome/Firefox extension for pen-testing to retrieve encryption keys of Widevine protected content !DON'T DECRYPT CONTENT UNLESS YOU HAVE THE RIGHT TO DO IT!

• UpdatedOct 29, 2024
• JavaScript

A web extension to save, manage and restore sessions, windows and tabs.

• UpdatedNov 21, 2024
• TypeScript