Extensions are software components that add specific capabilities to a larger software application. They enable users to customize and enhance their software environments in various domains, including web browsers, development IDEs, and operating systems. Extensions can range from simple UI tweaks to adding sophisticated new features. They play a crucial role in tailoring software solutions to individual needs, fostering a richer and more productive user experience.

Why Extensions Matter

Extensions allow for greater flexibility and personalization of software tools, empowering users to adapt tools according to their specific workflow and preferences. They encourage a vibrant ecosystem around software products where third-party developers can contribute valuable functionality that benefits the entire user community.

Common Uses of Extensions

For developers, understanding and leveraging extensions can lead to better software design and more engaging user interfaces. For users, extensions provide a path to a more personalized and efficient toolset.

Redux DevTools extension.

• UpdatedNov 7, 2023
• JavaScript

🥗 All-in-one professional pop-up dictionary and page translator which supports multiple search modes, page translations, new word notebook and PDF selection searching.

• UpdatedApr 7, 2024
• TypeScript

🌐 🔌 The MetaMask browser extension enables browsing Ethereum blockchain enabled websites

• UpdatedJul 18, 2025
• TypeScript

High performance, full-stack PHP framework delivered as a C extension.

• UpdatedJul 15, 2025
• PHP

uBlock: a fast, lightweight, and lean blocker for Chrome, Firefox, and Safari.

• UpdatedSep 8, 2022
• JavaScript

🚀 Power Your World with AI - Explore, Extend, Empower.

• UpdatedMay 1, 2025
• JavaScript

Open Source Alternative to NotebookLM / Perplexity / Glean, connected to external sources such as search engines (Tavily, Linkup), Slack, Linear, Notion, YouTube, GitHub, Discord and more.

• UpdatedJul 18, 2025
• TypeScript

Map your keys for web surfing, expand your browser with javascript and keyboard.

• UpdatedJul 13, 2025
• JavaScript

FireBug for designers › Edit any webpage, in any statehttps://a.nerdy.dev/gimme-visbug

• UpdatedJun 3, 2025
• JavaScript

Небольшое расширение, которое добавляет закадровый перевод видео из YaBrowser в другие браузеры

• UpdatedJun 23, 2025
• TypeScript

Free, ultrafast Copilot alternative for Vim and Neovim

• UpdatedApr 4, 2025
• Vim Script

Attribute Extensions for Unity

• UpdatedNov 21, 2023
• C#

Easily install PHP extensions in Docker containers

• UpdatedJul 18, 2025
• Shell

🧩 The cross-browser extension framework.

• UpdatedJul 17, 2025
• TypeScript

Tamper Dev is an extension that allows you to intercept and edit HTTP/HTTPS requests and responses as they happen without the need of a proxy. Works across all operating systems (including Chrome OS).

• UpdatedJun 17, 2024
• TypeScript

A simple, open source bilingual translation extension & Greasemonkey script (一个简约、开源的 双语对照翻译扩展 & 油猴脚本)

• UpdatedJul 3, 2025
• JavaScript

Open YouTube & Video browser-extension [top~1] Enrich your experience&choice!🧰200+options; clever features📌set&forget📌Longest-standing. Join🧩us?👨‍👩‍👧‍👧 ⋮ {playback|content discovery|player|extra buttons|distractions|related videos|shorts|ads|quality|codec|full tab|full screen}

• UpdatedJul 12, 2025
• JavaScript

哔哩哔哩 (bilibili.com) 辅助工具，可以替换播放器、推送通知并进行一些快捷操作

• UpdatedJun 11, 2021
• JavaScript

Don't waste your time with compliance. FastForward automatically skips annoying link shorteners.

• UpdatedApr 1, 2025
• JavaScript

Browser extension for rendering an isometric pixel art version of your GitHub contribution graph.

• UpdatedJun 30, 2025
• JavaScript