Open-source browser-extension software
469 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.
469 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| OpenMinis OpenMinis is a free, open-source mobile AI agent app for iOS and Android that connects leading LLM providers (Claude, GPT, Gemini, etc.) vi… | 76 | 4673 | active |
| hoothin/UserScripts A collection of Greasemonkey/Tampermonkey userscripts by hoothin, including Pagetual (auto-pager infinite scrolling), Picviewer CE+ (online… | 76 | 4329 | active |
| Manavarya09/design-extract designlang is an open-source CLI (npx designlang <url>) that uses a Playwright-driven headless browser to reverse-engineer any website's de… | 81 | 4275 | active |
| leetcode-mafia/cheetah Cheetah is a macOS app that provides real-time AI coaching for software engineering interviews. It transcribes conversation audio locally w… | 21 | 4260 | active |
| BrowserBox/BrowserBox BrowserBox is a commercial Remote Browser Isolation (RBI) platform that streams a full modern browser to any client at 60 FPS, keeping web … | 98 | 3920 | active |
| feapder feapder is a powerful, easy-to-use Python web crawling framework offering four spider types (AirSpider, Spider, TaskSpider, BatchSpider) fo… | 68 | 3736 | active |
| webhintio/hint webhint is a customizable linting engine for the web that checks sites and code for accessibility, performance, security, cross-browser com… | 61 | 3698 | active |
| fregante/GhostText GhostText is a browser extension plus editor plugin system that lets you write text in your preferred editor (VS Code, Sublime Text, Vim, E… | 69 | 3645 | active |
| NotebookLM MCP An MCP server and Claude Code skill that lets AI coding agents chat directly with Google NotebookLM notebooks, returning source-grounded, c… | 10 | 3432 | active |
| AtomicBot-ai/atomic-agent Atomic Agent is a local-first AI agent that runs entirely on your machine, using quantized models via llama.cpp to browse the web, edit fil… | 78 | 3326 | active |
| google-gemini/computer-use-preview A Python reference implementation of Gemini's computer-use agent that lets the model control a browser (via Playwright or Browserbase) to c… | 59 | 3224 | active |
| nilbuild/githunt GitHunt is a React web application and Chrome extension that lets users explore the most starred GitHub projects by week, with filtering by… | 56 | 3189 | active |
| aliasvault/aliasvault AliasVault is a privacy-first, end-to-end encrypted password manager with a built-in email alias server, letting users create unique identi… | 86 | 3164 | active |
| uku/Unblock-Youku Unblock Youku is an open-source Chrome extension that lets users outside mainland China access Chinese web services such as video and music… | 32 | 3153 | active |
| Virtual-Browser/VirtualBrowser VirtualBrowser is a free, open-source anti-fingerprint browser built on Chromium that lets users create and manage multiple isolated browse… | 88 | 3145 | active |
| adryfish/fingerprint-chromium A fingerprint browser built on Ungoogled Chromium that lets users spoof or control browser fingerprint characteristics to avoid detection. … | 83 | 3110 | active |
| GodsScion/Auto_job_applier_linkedIn A Python/Selenium desktop application that automates LinkedIn Easy Apply job applications, finding relevant jobs, filling application quest… | 93 | 2931 | active |
| salarcode/SmartProxy SmartProxy is a Firefox, Chrome, and Edge browser extension that automatically enables or disables proxy usage per website based on customi… | 88 | 2748 | active |
| CristianOlivera1/openvid Openvid is an open-source, browser-based video editor for recording screens and creating polished product demos with cinematic zooms, 3D de… | 60 | 2723 | active |
| botswin/BotBrowser BotBrowser is a privacy-focused browser core (Chromium-based) that unifies and controls browser fingerprint signals across platforms, integ… | 85 | 2632 | active |
| srbhptl39/MCP-SuperAssistant A browser extension (Chrome and Firefox) that brings Model Context Protocol (MCP) tool support to web-based AI chat platforms like ChatGPT,… | 55 | 2592 | active |
| lmnr-ai/index Index is an open-source browser agent that autonomously performs complex tasks on the web by turning any website into an accessible API. It… | 10 | 2438 | active |
| learnhouse/learnhouse LearnHouse is a next-generation open-source learning management system (LMS) for creating, sharing, and selling educational content. It com… | 100 | 2404 | active |
| keepassxreboot/keepassxc-browser KeePassXC-Browser is a WebExtension that integrates the KeePassXC password manager with Firefox, Chrome/Chromium, and Edge via native messa… | 99 | 2358 | active |
| dnakov/little-rat A small Chrome extension that monitors and optionally blocks network calls made by other browser extensions. It requires the extensions-on-… | 31 | 2338 | active |
| easychen/checkchan-dist Check酱 (CheckChan) is a web page content change monitoring tool consisting of a Chrome/Edge browser extension and a self-hostable cloud com… | 32 | 2323 | active |
| AntiDebug_Breaker A Chrome browser extension built on the Hook_JS library that assists with JavaScript reverse engineering and penetration testing reconnaiss… | 83 | 2203 | active |
| vmoranv/jshookmcp An MCP server exposing 600+ tools across 34 domains for JavaScript reverse engineering and security research, including browser automation,… | 72 | 2056 | active |
| Jamailar/Beav Beav (formerly RedBox) is a local-first AI content operations workbench for social media creators, combining a desktop app and a Chrome/Edg… | 82 | 1998 | active |
| autoclaw-cc/xiaohongshu-skills A set of AI agent skills (SKILL.md format) plus a Chrome extension that automates Xiaohongshu (RED) using your real logged-in browser sessi… | 64 | 1938 | active |
| ninoseki/mitaka Mitaka is a browser extension for Chrome and Firefox that simplifies OSINT (Open Source Intelligence) searches. It automatically detects an… | 91 | 1864 | active |
| mailvelope/mailvelope Mailvelope is a browser extension for Chrome and Firefox that adds OpenPGP end-to-end email encryption to arbitrary webmail providers. It u… | 85 | 1847 | active |
| mozilla/fx-private-relay Firefox Relay is a Mozilla service that generates email aliases (masks) which forward messages to your real inbox, hiding your personal add… | 95 | 1802 | active |
| nsfw-filter/nsfw-filter A free, open-source, privacy-focused browser extension that blocks NSFW images using on-device AI classification with TensorFlow.js. It hid… | 91 | 1786 | active |
| leoding86/webextension-pixiv-toolkit Pixiv Toolkit Next is a WebExtension (Chrome/Firefox) that adds a download and content-management toolkit to Pixiv, letting users download … | 23 | 1783 | active |
| qiutongxue/oba-live-tool A desktop Electron application that automates live-streaming e-commerce tasks on Chinese platforms including Douyin, Xiaohongshu, Kuaishou,… | 85 | 1695 | active |
| andrewnguonly/Lumos Lumos is a Chrome extension that acts as a RAG-powered LLM co-pilot for browsing the web, letting users summarize pages and ask questions a… | 18 | 1511 | active |
| AgentQL AgentQL is a suite of tools for extracting structured data and automating workflows on live websites using an AI-powered natural language q… | 70 | 1472 | active |
| momosecurity/FindSomething FindSomething is a passive browser extension for Chrome and Firefox that extracts potentially sensitive information (like emails, API keys,… | 32 | 1470 | active |
| ttop32/MouseTooltipTranslator A browser extension (Chrome, Edge, Firefox) that translates any text you hover over or select, showing an inline tooltip. It also supports … | 90 | 1332 | active |
| tenox7/wrp WRP (Web Rendering Proxy) is a Go-based proxy server that lets vintage and legacy web browsers access the modern web. It renders pages usin… | 85 | 1294 | active |
| Mereithhh/van-nav Van Nav is a lightweight self-hosted navigation/start page that aggregates all your services and links, with integrated search engine suppo… | 44 | 1285 | active |
| better-auth/better-hub Better Hub is a re-imagined code collaboration platform that provides an improved interface for GitHub, covering repo overviews, PR reviews… | 50 | 1267 | active |
| AIPexStudio/AIPex AIPex is an open-source (MIT) AI browser automation assistant delivered as a Chrome/Edge extension that runs inside your existing browser w… | 76 | 1256 | active |
| franklioxygen/MyTube MyTube is a self-hosted web application that downloads videos from YouTube, Bilibili, Twitch, MissAV, and any yt-dlp-supported site, storin… | 65 | 1251 | active |
| clacky-ai/openclacky OpenClacky is an open-source (MIT) AI agent platform written in Ruby that runs locally, offering a CLI and Web UI for completing tasks via … | 79 | 1204 | active |
| ShotEasy ShotEasy is a free online photo and screenshot toolkit built with Astro that runs entirely in the browser using WebAssembly. It offers scre… | 70 | 1168 | active |
| asdfghj1237890/WebVideo2NAS A self-hosted pipeline consisting of a Chrome extension and a Dockerized FastAPI backend that detects HLS (M3U8), DASH (MPD), MP4, and MOV … | 82 | 1164 | active |
| nico-martin/gemma4-browser-extension A Chrome extension that runs an on-device AI agent powered by Transformers.js and Gemma 4 via WebGPU, entirely locally with no data sent to… | 57 | 1155 | active |
| GENEXIS-AI/chromex Chromex is a Chrome MV3 side-panel extension that connects the browser to OpenAI's Codex CLI via a local native-messaging bridge. It lets u… | 66 | 1150 | active |
| tholian-network/stealth Stealth is a secure, privacy-focused web browser, scraper, and proxy built in JavaScript that emphasizes automation, bandwidth efficiency, … | 32 | 1149 | active |
| NativeMindBrowser/NativeMindExtension NativeMind is an open-source browser extension that provides a fully private, on-device AI assistant by connecting to local LLMs via Ollama… | 60 | 1133 | active |
| EchoHS/GeekezBrowser GeekEZ Browser is an anti-detect (fingerprint spoofing) browser built on Electron and Puppeteer with integrated Xray-core proxy support. It… | 80 | 1127 | active |
| yeahhe365/Gemini-Nexus Gemini Nexus is a Chrome extension (Manifest V3) that adds an AI assistant layer to the browser, integrating Gemini Web, the Gemini API, an… | 79 | 1112 | active |
| vifreefly/kimuraframework Kimuraframework (Kimurai) is a Ruby web scraping framework with an AI-assisted DSL: an LLM generates XPath selectors from a schema on first… | 57 | 1102 | active |
| mozilla/gecko-dev A read-only Git mirror of Mozilla's Mercurial repositories containing the Gecko engine and Firefox browser source code. This repository has… | 10 | 3693 | maintenance |
| am-will/codex-skills A collection of Codex/agent skills written in Shell covering planning, documentation access, prompting, frontend design guidance, Codex too… | 54 | 1033 | active |
| daijro/hrequests hrequests is a Python HTTP client library that replaces the requests library with browser TLS fingerprint replication, HTTP/2 support, and … | 31 | 1026 | active |
| ghostery/adblocker An efficient, embeddable JavaScript/TypeScript adblocker library that blocks ads, trackers, and annoyances. It is uBlock Origin- and Easyli… | 95 | 1014 | active |
| marcelduran/yslow YSlow analyzes web pages and grades their performance against Yahoo's rules for high performance web pages. It ships as browser extensions,… | 32 | 2201 | maintenance |
| Ghr07h/Heimdallr Heimdallr is a fully passive Chrome extension for security professionals that identifies high-risk vulnerability framework fingerprints in … | 23 | 1684 | maintenance |
| IndieKKY/bilibili-subtitle A browser extension (哔哔君) that displays a clickable subtitle list panel for Bilibili videos, enabling jump-to-timestamp navigation, subtitl… | 49 | 1183 | maintenance |
| squizlabs/HTML_CodeSniffer HTML_CodeSniffer is a client-side JavaScript library that checks HTML documents or source code for violations of defined coding and accessi… | 23 | 1145 | maintenance |
| d4t4x/data-selfie Data Selfie is a browser extension for Chrome and Firefox that tracks your own behavior on Facebook and analyzes the collected data locally… | 32 | 1024 | maintenance |
| elendirx/web2web A proof-of-concept for serving websites entirely via torrents and the Bitcoin blockchain, with no webserver or domain. A Bitcoin OP_RETURN … | 32 | 2241 | experimental |
| ddupont808/GPT-4V-Act GPT-4V-Act is a multimodal AI agent that combines GPT-4V(ision) with a Chromium browser, using Set-of-Mark prompting and a DOM auto-labeler… | 28 | 1059 | experimental |
| gragland/chatgpt-chrome-extension A Chrome extension that integrates ChatGPT into every text box on the internet, letting users invoke AI assistance via right-click without … | 32 | 2961 | abandoned |
| mozilla/fathom Fathom is a supervised-learning framework for recognizing and classifying parts of web pages, tagging DOM nodes with types and probabilitie… | 10 | 1959 | abandoned |
| tomer8007/widevine-l3-decryptor A Chrome extension that demonstrated bypassing Widevine L3 DRM by hijacking Encrypted Media Extensions calls to extract content decryption … | 10 | 1246 | abandoned |
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