Open-source browser-extension software
595 open-source libraries, tools and applications tagged browser-extension, ranked by how closely browser-extension is their primary purpose, then by adoption and maintenance health. Each entry links to a page with sources, use cases and when to choose or avoid it.
595 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| uBlock Origin uBlock Origin is an efficient, wide-spectrum content blocker browser extension for Chromium-based browsers and Firefox. It blocks ads, trac… | 94 | 68563 | active |
| adam-p/markdown-here Markdown Here is a browser and email-client extension (Chrome, Firefox, Opera, Safari, Thunderbird, Postbox) that lets users write email in… | 48 | 60265 | active |
| Joplin Joplin is an open-source, privacy-focused note-taking and to-do application that stores notes in Markdown and supports notebooks, tags, and… | 99 | 56805 | stable |
| linshenkx/prompt-optimizer Prompt Optimizer is an AI prompt optimization tool that helps users write, refine, test, and evaluate prompts for better LLM outputs. It sh… | 89 | 38597 | active |
| ZuodaoTech/everyone-can-use-english Everyone Can Use English is an open-source project combining a well-known English learning book with the Enjoy app, an AI-powered language … | 71 | 38533 | active |
| maboloshi/github-chinese A userscript that fully translates the GitHub interface into Simplified and Traditional Chinese, covering menus, buttons, titles, time elem… | 77 | 36136 | active |
| Refined GitHub Refined GitHub is a browser extension that simplifies the GitHub interface and adds many quality-of-life features. It supports Chrome, Fire… | 96 | 32220 | active |
| the1812/Bilibili-Evolved A powerful userscript that enhances the Bilibili video website with a modular component system for features like UI tweaks, video downloadi… | 93 | 30628 | active |
| alibaba/page-agent Page Agent is a JavaScript library that embeds an AI GUI agent directly into any web page with a single script, letting users control the i… | 82 | 29343 | active |
| philc/vimium Vimium is a browser extension that brings Vim-style keyboard navigation to Chrome, Edge, and Firefox. It lets users scroll, open links, fin… | 71 | 27009 | active |
| Gopeed Gopeed is a free, open-source, cross-platform download manager built with Golang and Flutter that supports HTTP/HTTPS, BitTorrent, Magnet, … | 88 | 26917 | active |
| nextai-translator/nextai-translator A browser extension and cross-platform desktop application that provides translation of selected text using the ChatGPT/OpenAI API. It also… | 93 | 24977 | active |
| Max-Eee/NeoPass NeoPass is a Chrome extension that provides AI‑powered assistance and bypass tools for online exam portals such as Iamneo, HackerRank and N… | 86 | 24502 | active |
| shimohq/chinese-programmer-wrong-pronunciation A multilingual web and mobile application that lists English technical terms commonly mispronounced by Chinese programmers, providing corre… | 75 | 23323 | active |
| hmjz100/LinkSwift A Tampermonkey userscript that extracts direct download links from major Chinese cloud storage services (Baidu Netdisk, Aliyun Drive, China… | 84 | 22948 | active |
| SingleFile SingleFile is an open-source browser extension for Chrome, Edge, Firefox, and Safari that saves an entire web page - including images, styl… | 99 | 22606 | stable |
| darkreader/darkreader Dark Reader is an open-source MIT-licensed browser extension that analyzes web pages and generates a customizable dark mode to reduce eyest… | 98 | 22455 | active |
| cat-catch Cat-catch is an open-source browser extension that sniffs and lists media resources (video, audio, images) loaded by the current web page. … | 90 | 22129 | active |
| AutomaApp/automa Automa is a browser extension for Chrome and Firefox that lets users automate browser tasks by visually connecting blocks into workflows. I… | 62 | 21649 | active |
| Linkwarden Linkwarden is a self-hosted, open-source collaborative bookmark manager for collecting, reading, annotating, and preserving webpages. It ar… | 98 | 20155 | active |
| daily.dev daily.dev is an open‑source personalized developer news feed and community platform. It is delivered as a browser new‑tab extension, a prog… | 77 | 20096 | active |
| daily.dev daily.dev is a free, open-source personalized news feed and community platform for developers, aggregating content from 2,000+ sources and … | 77 | 20096 | active |
| Catppuccin Catppuccin is a community-driven pastel color scheme with ports for hundreds of applications, editors, terminals, and platforms. The main r… | 62 | 19815 | active |
| alyssaxuu/screenity Screenity is a free, privacy‑friendly Chrome extension that records your screen, webcam and audio. It also includes an in‑browser video edi… | 98 | 18755 | active |
| Ruffle Ruffle is an open-source Adobe Flash Player emulator written in Rust, targeting desktop and the web via WebAssembly. It supports ActionScri… | 99 | 18709 | active |
| zhishile/codex-auth-helper A Chrome (Manifest V3) browser extension that extracts a logged-in ChatGPT session locally and generates a Codex-compatible auth. credentia… | 54 | 17403 | active |
| QwenLM/Qwen-Agent Qwen-Agent is a Python framework for building LLM agent applications on top of Qwen models, providing function calling, MCP support, code i… | 58 | 17128 | active |
| Xiaohongshu MCP A Model Context Protocol (MCP) server written in Go that lets AI assistants like Claude Code access and operate Xiaohongshu (Little Red Boo… | 79 | 16096 | active |
| coderamp-labs/gitingest Gitingest turns any Git repository into a prompt-friendly text digest of its codebase, suitable for feeding into LLMs. It is available as a… | 68 | 15879 | active |
| xcanwin/KeepChatGPT KeepChatGPT is a userscript/browser plugin that enhances ChatGPT's data security and usability. It keeps sessions alive, blocks tracking, d… | 69 | 14898 | active |
| reduxjs/redux-devtools Redux DevTools is a set of developer tools for Redux and other state-management architectures, offering hot reloading, action replay, and t… | 76 | 14368 | active |
| Vendicated/Vencord Vencord is a Discord client modification written in TypeScript that ships with a large set of preinstalled plugins and theme support. It in… | 66 | 14171 | active |
| SponsorBlock SponsorBlock is an open-source crowdsourced browser extension that automatically skips sponsor segments and other annoying parts (intros, o… | 94 | 13890 | active |
| nanobrowser/nanobrowser Nanobrowser is an open-source Chrome extension that provides AI-powered web automation through a multi-agent system (Planner, Navigator, et… | 67 | 13818 | active |
| Anarios/return-youtube-dislike Return YouTube Dislike is an open-source browser extension for Chrome and Firefox (plus a userscript) that restores the dislike count on Yo… | 95 | 13788 | active |
| MeterSphere MeterSphere is an open-source continuous testing platform with a built-in AI assistant for generating test cases. It combines test case man… | 94 | 13541 | active |
| crimx/ext-saladict Saladict is an open-source Chrome/Firefox WebExtension providing an all-in-one pop-up dictionary and page translator with multiple search m… | 97 | 13365 | active |
| MetaMask MetaMask is a self-custodial crypto wallet available as a browser extension (Chrome, Firefox, Brave, Edge, Opera) and mobile app, enabling … | 95 | 13237 | active |
| Plasmo Framework Plasmo is an open-source framework and SDK for building browser extensions with React and TypeScript. It handles bundling, manifest generat… | 69 | 13158 | active |
| KISS Translator KISS Translator is an open-source browser extension (plus Greasemonkey/Tampermonkey userscript) that renders bilingual, side-by-side transl… | 96 | 12840 | active |
| hangwin/mcp-chrome A Chrome extension that acts as a Model Context Protocol (MCP) server, exposing your real Chrome browser—its tabs, login states, and config… | 50 | 12496 | active |
| Listen 1 Listen 1 is an open-source music player that aggregates search and playback from multiple Chinese streaming platforms (NetEase Cloud Music,… | 53 | 11433 | active |
| linkding linkding is a self-hosted bookmark manager built with Django, designed to be minimal, fast, and easy to deploy via a single Docker containe… | 96 | 11255 | stable |
| Kutt URL Shortener Kutt is a free, open-source, self-hostable URL shortener built with Node.js. It supports custom domains, link management, private click sta… | 91 | 11130 | active |
| NopeCHA NopeCHA is an AI-powered CAPTCHA solving service distributed as a browser extension (Chrome/Firefox/Edge) plus Python and Node.js client li… | 87 | 10997 | active |
| ChatGPTBox-dev/chatGPTBox A browser extension that deeply integrates ChatGPT into your browsing experience across Chrome, Edge, Firefox, Safari, and Android. It prov… | 91 | 10757 | active |
| chathub-dev/chathub ChatHub is an all-in-one AI chat client, originally a Chrome/Edge browser extension and now also a web app and mobile/desktop apps, that le… | 58 | 10658 | active |
| wxt-dev/wxt WXT is a TypeScript framework for building web browser extensions, described as 'like Nuxt, but for Web Extensions'. It provides file-based… | 88 | 10562 | active |
| mengxi-ream/read-frog Read Frog is an open-source AI-powered browser extension for language learning and immersive translation. It translates web pages, selected… | 84 | 10112 | active |
| XIU2/UserScript A collection of personal Tampermonkey/GreasyFork userscripts by X.I.U, including GitHub high-speed download enhancements, AutoPager infinit… | 74 | 10069 | active |
| StylishThemes/GitHub-Dark A dark theme userstyle (user.css) for the GitHub website, applied via the Stylus browser extension. It restyles GitHub's interface with a d… | 77 | 9987 | active |
| star-history/star-history Star History is a web application and API that generates GitHub star history charts and rank badges for any repository. It supports embeddi… | 75 | 9545 | active |
| ccfddl/ccf-deadlines A community-maintained tracker of worldwide academic conference deadlines, offering a website portal, WeChat applet, and multiple extension… | 77 | 9463 | active |
| Buster Buster is a browser extension that solves reCAPTCHA challenges by completing their audio challenges using speech recognition. It works on C… | 85 | 9335 | active |
| mediago-dev/mediago MediaGo is a cross-platform video downloader that automatically sniffs m3u8/HLS streams and other video resources from web pages, supportin… | 77 | 9237 | active |
| Violentmonkey Violentmonkey is an open-source userscript manager implemented as a browser extension built on WebExtensions APIs. It lets users install an… | 97 | 8994 | active |
| Solidtime Solidtime is a modern open-source time-tracking application for freelancers and agencies, built with Laravel and Vue. It offers a live time… | 92 | 8942 | active |
| BewlyBewly/BewlyBewly BewlyBewly is a browser extension that redesigns the Bilibili homepage with a modern UI inspired by YouTube, Vision OS, and iOS, including … | 10 | 8809 | active |
| rockbenben/ChatGPT-Shortcut AiShort (ChatGPT Shortcut) is a searchable, tag-filterable library of 5000+ ready-to-use AI prompts for ChatGPT, Claude, Gemini, DeepSeek, … | 94 | 8785 | active |
| SimpRead SimpRead (简悦) is a browser extension that provides an immersive, distraction-free reader view for web pages, with site-specific adaptations… | 65 | 8736 | active |
| floccusaddon/floccus Floccus is a free and open-source browser extension (with companion Android/iOS apps) that privately syncs native browser bookmarks and tab… | 99 | 8569 | active |
| FluentRead/FluentRead FluentRead is an open-source browser extension that provides bilingual webpage translation, instant selection translation, and image text t… | 94 | 8510 | active |
| n4ze3m/page-assist Page Assist is an open-source browser extension that adds a sidebar and web UI for interacting with locally running AI models like Ollama f… | 91 | 8225 | active |
| Tencent/BrowserSkill BrowserSkill is a CLI (`bsk`) plus browser extension that lets shell-capable AI agents like Cursor, Claude Code, and Codex control your rea… | 79 | 7905 | active |
| ilyhalight/voice-over-translation A userscript/browser extension that adds AI voice-over translation and subtitles to videos on many websites, powered by Yandex services. It… | 99 | 7570 | active |
| RSSHub RSSHub Radar is a browser extension that helps users quickly discover RSS and RSSHub feeds available on the web pages they visit. It simpli… | 72 | 7366 | active |
| BrowserMCP/mcp Browser MCP is an MCP server plus Chrome extension that lets AI applications like Claude, Cursor, VS Code, and Windsurf control the user's … | 25 | 7171 | active |
| NickvisionApps/Parabolic Parabolic is a graphical frontend for yt-dlp that downloads video and audio from hundreds of websites in formats like mp4, webm, mp3, opus,… | 84 | 7124 | active |
| LasCC/HackTools HackTools is an all-in-one browser extension for offensive security professionals that bundles penetration testing tools like XSS payloads,… | 23 | 7087 | active |
| SimpleLogin SimpleLogin is an open-source email aliasing service that lets users create unique aliases to receive and send emails without exposing thei… | 93 | 7012 | active |
| openstyles/stylus Stylus is a browser extension for Chrome, Firefox, and Chromium-based browsers that lets users restyle websites by installing and managing … | 96 | 6898 | active |
| webclipper/web-clipper Web Clipper is an open-source browser extension that saves web content to many note-taking platforms such as Notion, OneNote, Obsidian, Bea… | 43 | 6856 | active |
| steipete/summarize Summarize is a Node.js CLI and Chrome/Firefox extension that extracts clean text from web pages, PDFs, YouTube videos, podcasts, and audio/… | 84 | 6729 | active |
| victornpb/undiscord Undiscord is a userscript (installable via Tampermonkey, Violentmonkey, or Greasemonkey) that bulk-deletes your own messages in Discord cha… | 53 | 6658 | active |
| iorate/ublacklist uBlacklist is a browser extension that blocks specified sites from appearing in Google and other major search engine results. It supports m… | 99 | 6657 | active |
| wechatsync/Wechatsync Wechatsync is an open-source Chrome extension that syncs articles from WeChat Official Accounts (or any webpage) to 29+ content platforms l… | 57 | 6380 | active |
| Tridactyl Tridactyl is a Firefox WebExtension that replaces the browser's default control mechanism with a Vim-like keyboard-driven interface, inspir… | 76 | 6360 | active |
| itorr/nbnhhsh A userscript and web tool that translates Chinese pinyin initialism abbreviations (like 'yyds' or 'xswl') used on social platforms into rea… | 77 | 6280 | active |
| hanydd/BilibiliSponsorBlock A browser extension that automatically skips sponsored segments, intros/outros, and like-subscribe reminders in Bilibili videos, ported fro… | 94 | 6243 | active |
| JimmyLv/BibiGPT-v1 BibiGPT is an AI-powered web application that summarizes videos and audio from platforms like Bilibili, YouTube, TikTok, and podcasts, gene… | 54 | 6241 | active |
| brookhong/Surfingkeys Surfingkeys is a browser extension for Chrome, Firefox, Edge, and Safari that provides Vim-style keyboard navigation and control of the web… | 76 | 6178 | active |
| glacambre/firenvim Firenvim is a browser extension plus Neovim plugin that embeds a Neovim client inside Firefox and Chrome, replacing textareas with a full N… | 77 | 6150 | active |
| Passbolt Passbolt Community Edition API is the JSON backend for the open source, security-first password manager for teams, built in PHP on CakePHP.… | 96 | 6136 | stable |
| langren1353/GM_script A collection of Tampermonkey/Greasemonkey userscripts, most notably AC-baidu, which removes redirects and ads from Baidu, Sogou, Google, Bi… | 74 | 6058 | active |
| FilipePS/Traduzir-paginas-web TWP - Translate Web Pages is a browser extension (WebExtension) that translates web pages in real time using Google, Bing, or Yandex transl… | 93 | 6039 | active |
| asciimoo/hister Hister is a self-hosted, privacy-focused personal search engine that indexes the full contents of visited web pages and local files. It off… | 82 | 5936 | active |
| QOwnNotes QOwnNotes is an open-source plain-text Markdown notepad and todo-list manager for Linux, macOS, and Windows, built with Qt/C++. Notes are s… | 93 | 5886 | stable |
| NirmalScaria/le-git-graph A browser extension that adds a visual git commit graph to the GitHub website via a new 'Commits' tab. It authenticates with GitHub OAuth a… | 62 | 5867 | active |
| GoogleChromeLabs/ProjectVisBug VisBug is an open-source browser extension that brings design-tool interactions to any live webpage, letting designers point, click, multi-… | 10 | 5766 | active |
| Tampermonkey/tampermonkey Tampermonkey is the most popular userscript manager, available as a browser extension for Chrome, Edge, Safari, Opera, and Firefox. It lets… | 35 | 5765 | active |
| zxlie/FeHelper FeHelper is an all-in-one browser extension toolbox for Chrome, Firefox, and Edge (Manifest V3) that bundles 30+ developer utilities such a… | 74 | 5676 | active |
| Pixiv Batch Downloader A browser extension (Chrome, Edge, Firefox) for batch downloading illustrations, manga, Ugoira animations, and novels from Pixiv. It offers… | 97 | 5664 | active |
| GargantuaX/gemini-watermark-remover A 100% client-side tool that removes Gemini AI watermarks from images and videos using a mathematically precise Reverse Alpha Blending algo… | 83 | 5662 | active |
| Neet-Nestor/Telegram-Media-Downloader A browser userscript (installable via Tampermonkey, Violentmonkey, etc.) that adds media download buttons to the Telegram webapp. It enable… | 61 | 5555 | active |
| Uniswap Interface The open-source repository for Uniswap Labs' front-end interfaces, including the Uniswap web app, the Uniswap Wallet mobile app, and the wa… | 94 | 5534 | active |
| ScriptCat ScriptCat is an open-source browser extension that acts as a userscript manager, fully compatible with Tampermonkey scripts and GM_* APIs. … | 94 | 5533 | active |
| 88lin/video_vip A Tampermonkey/Greasemonkey userscript that integrates multiple third-party parsing interfaces to bypass VIP membership restrictions on Chi… | 64 | 5531 | active |
| altair-graphql/altair Altair is a feature-rich GraphQL client IDE for running queries, mutations, and subscriptions, with schema documentation, environments, fil… | 96 | 5434 | active |
| Vue DevTools Vue Devtools is a browser extension (Chrome, Firefox, Edge) plus a standalone Electron app for inspecting and debugging Vue.js applications… | 23 | 24682 | maintenance |
| bpc-clone/bpc_chrome_support Support repository for Bypass Paywalls Clean, a browser extension that bypasses paywalls on news sites. The extension itself has moved to g… | 32 | 5265 | active |
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