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 |
|---|---|---|---|
| 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 |
| wseagar/eight-dollars A browser extension that distinguishes Twitter Blue subscribers from genuinely verified accounts on Twitter/X by adding visual indicators t… | 23 | 1182 | maintenance |
| muaz-khan/Chrome-Extensions A collection of WebRTC-based Google Chrome extensions by Muaz Khan, including screen recording (RecordRTC) and peer-to-peer desktop screen … | 32 | 1154 | maintenance |
| micmro/performance-bookmarklet A bookmarklet and browser extension (Chrome/Firefox) that analyzes the current page's performance using the Resource Timing, Navigation Tim… | 23 | 1150 | maintenance |
| liminalpurr/jizhi Jizhi is a Chrome/Firefox/Edge browser extension that replaces the new tab page with animated layered noise waves rendered in traditional C… | 23 | 1129 | maintenance |
| kdzwinel/SnappySnippet A Chrome/Chromium DevTools extension that extracts the HTML and computed CSS of a selected DOM element into a clean, readable snippet. Snip… | 23 | 1124 | maintenance |
| jawil/GayHub GayHub is a Chrome extension that enhances the GitHub browsing experience with a VS Code-style file tree sidebar, table-of-contents navigat… | 32 | 1119 | maintenance |
| luofei614/SocketLog SocketLog is a probe-style server-side debugging tool for PHP that pushes runtime debug information (errors, SQL statements, performance me… | 32 | 1118 | maintenance |
| medialab/artoo artoo.js is a JavaScript library injected into a webpage's context (typically via a bookmarklet) that provides client-side web scraping uti… | 23 | 1117 | maintenance |
| MiguelsPizza/WebMCP WebMCP (MCP-B) is a protocol and TypeScript SDK that exposes JavaScript functions in web pages to LLMs as MCP tools, via a Chrome extension… | 38 | 1108 | maintenance |
| zenorocha/codecopy CodeCopy is a browser extension that adds a copy-to-clipboard button to every code block on supported sites like GitHub, MDN, StackOverflow… | 23 | 1104 | maintenance |
| mozilla/contain-facebook Facebook Container is a Firefox browser extension by Mozilla that isolates Facebook activity into a dedicated container tab. It prevents Fa… | 63 | 1069 | maintenance |
| Streamus Streamus is a Google Chrome browser extension that provides a YouTube-based video and music player with playlist management. It is built in… | 23 | 1069 | maintenance |
| DennisSnijder/MakeGithubGreatAgain A browser extension for Chrome and Firefox that restores GitHub's classic look by removing the dark topbar and reverting the new color sche… | 23 | 1051 | maintenance |
| webmachinelearning/webmcp WebMCP is a proposed web platform API (W3C Community Group specification) that lets web developers expose JavaScript functions or HTML form… | 63 | 4634 | experimental |
| 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 |
| abundantbeing/hermes-browser-extension A Chrome/Edge/Chromium side-panel browser extension that connects active web context to a Hermes Agent runtime via a local gateway, Hermes … | 80 | 1655 | experimental |
| anc95/writely Writely is an open-source browser extension for Chrome, Firefox, and Edge that brings GPT-powered AI writing assistance to any editable web… | 33 | 1296 | experimental |
| TaxyAI/browser-extension Taxy is an open-source Chrome browser extension that uses GPT-4 to control the browser and perform repetitive actions on the user's behalf … | 21 | 1277 | experimental |
| model-zoo/shift-ctrl-f A Chrome extension that lets users search a webpage using natural language questions instead of exact string matching. It runs a MobileBERT… | 10 | 1100 | experimental |
| SwitchyOmega SwitchyOmega is a browser extension that lets users manage and switch between multiple proxy configurations quickly. It provides a UI for c… | 23 | 22603 | abandoned |
| SwitchyOmega SwitchyOmega is a browser extension for Chromium and Firefox that lets users manage and quickly switch between multiple proxy profiles, inc… | 23 | 22603 | abandoned |
| richards199999/Thinking-Claude Thinking Claude is a browser extension plus a set of 'thinking protocol' system instructions that make Claude's chat interface show an expl… | 55 | 17028 | abandoned |
| checkly/headless-recorder Headless Recorder is a Chrome extension that records browser interactions (clicks, typing, navigation) and generates Playwright or Puppetee… | 10 | 15309 | abandoned |
| wong2/chatgpt-google-extension A browser extension that displays ChatGPT responses alongside results from Google and other search engines like Bing, DuckDuckGo, and Brave… | 32 | 13042 | abandoned |
| pixeltris/TwitchAdSolutions A collection of userscripts and uBlock Origin filters that block or bypass ads on Twitch streams using techniques like video swapping and a… | 10 | 11359 | abandoned |
| dxcweb/high-speed-downloader A high-speed downloader tool, distributed via npm, designed to accelerate file downloads (notably from Baidu Netdisk). The project is no lo… | 32 | 7102 | abandoned |
| TheRealJoelmatic/RemoveAdblockThing A Tampermonkey userscript that removes YouTube's 'Ad blocker is not allowed' popup and bypasses ad blocker detection. It also provides an u… | 81 | 5976 | abandoned |
| OctoLinker/OctoLinker OctoLinker is a browser extension for GitHub that turns language-specific import statements like require, include, and import into clickabl… | 23 | 5385 | abandoned |
| ansh/jiffyreader-public-archive Jiffy Reader is a browser extension that speeds up reading on any website by bolding the initial parts of words (bionic reading style), wit… | 10 | 4007 | abandoned |
| FoundZiGu/GuJumpgate A Chrome browser extension that automated registration of free accounts and PayPal-based Plus subscription activation flows, including emai… | 10 | 3888 | abandoned |
| FastForwardTeam/FastForward FastForward is a browser extension for Chromium, Edge, and Firefox that automatically skips link shorteners and wait-for-ad interstitial pa… | 67 | 3767 | abandoned |
| 31b4/Leetcode-Premium-Bypass A Chrome browser extension that unlocked LeetCode premium features such as company-tagged questions and frequency bars without a paid subsc… | 10 | 3383 | abandoned |
| EFForg/https-everywhere HTTPS Everywhere was a Firefox, Chrome, and Opera browser extension by EFF that rewrote HTTP requests to HTTPS to encrypt browsing. It was … | 10 | 3354 | abandoned |
| defunkt/dotjs dotjs is a Google Chrome extension plus a tiny local Ruby web server that executes JavaScript files from ~/.js on matching websites, with j… | 32 | 3137 | abandoned |
| mozilla/webextension-polyfill A lightweight polyfill that lets browser extensions use the Promise-based `browser` API namespace in Chrome, matching Firefox's WebExtensio… | 10 | 3067 | abandoned |
| 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 |
| YePpHa/YouTubeCenter YouTube Center is a browser extension/userscript that enhances YouTube with features like video downloading, automatic quality selection, a… | 10 | 2903 | abandoned |
| React-Sight/React-Sight React Sight is a browser extension (Chrome and Firefox) that renders a live visualization of a React application's component hierarchy tree… | 23 | 2861 | abandoned |
| samuelmaddock/metastream Metastream is a web application and browser extension for watching streaming media (e.g., YouTube, Netflix) in sync with friends, with real… | 60 | 2648 | abandoned |
| angular/batarang AngularJS Batarang is a Chrome DevTools browser extension for inspecting and debugging AngularJS applications. It provides insight into sco… | 10 | 2413 | abandoned |
| GoogleChrome/web-vitals-extension A Chrome extension by Google that measures Core Web Vitals (LCP, CLS, INP) plus diagnostic metrics (TTFB, FCP) in real time, matching how C… | 10 | 2379 | abandoned |
| codebutler/firesheep Firesheep is a Firefox extension that demonstrates HTTP session hijacking attacks by sniffing unencrypted Wi-Fi traffic and capturing sessi… | 32 | 2351 | abandoned |
| cehui0303/Tmall_Tickets A Chrome browser extension that automates submitting purchase orders and payment requests for Maotai liquor on Tmall Supermarket's flash sa… | 32 | 2296 | abandoned |
| ben174/git-draw A Chrome extension that lets you draw freely on your GitHub contribution heatmap. It exports your drawing as a git commit script that, when… | 32 | 2160 | abandoned |
| ueokande/vim-vixen Vim Vixen is a Firefox WebExtension add-on that lets users navigate and control the browser with Vim-style keyboard shortcuts and a command… | 10 | 2091 | abandoned |
| zythum/mama2 MAMA2 is a browser bookmarklet/plugin project that replaces Flash video players on Chinese video sites (Bilibili, Youku, Tudou, Sohu, etc.)… | 32 | 2038 | abandoned |
| Zero Dark Matrix Chrome DevTools Theme Zero Dark Matrix is a highly customized dark theme for Chrome DevTools, distributed as a Chrome extension. It styles the Elements, Sources,… | 32 | 1993 | abandoned |
| rangle/augury Augury is a Chrome and Firefox DevTools browser extension for debugging and visualizing Angular 2+ applications, letting developers inspect… | 10 | 1989 | 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 |
| C-Nedelcu/talk-to-chatgpt A Chrome and Edge browser extension that lets users talk to ChatGPT using speech recognition and hear responses via text-to-speech, with op… | 32 | 1929 | abandoned |
| 52cik/github-hans A Tampermonkey userscript that translates the GitHub interface into Chinese for Chinese-speaking users. It is deprecated, as official Chine… | 32 | 1911 | abandoned |
| gxvv/ex-baiduyunpan A Tampermonkey userscript that removes Baidu Netdisk's large-file download restrictions and enables batch copying of download links. It wor… | 10 | 1911 | abandoned |
| Nerver4Ever/SevenSha1UIAdvancedHelper A Tampermonkey userscript that enhances the 115 cloud storage web UI with SHA1-based file transfer and extraction features. It lets users s… | 10 | 1768 | abandoned |
| domeccleston/sharegpt ShareGPT is an open-source Chrome extension that lets users share permanent links to ChatGPT conversations with one click, backed by a Next… | 10 | 1754 | abandoned |
| cnwangjie/better-onetab Better-Onetab is a browser extension for Chrome and Firefox that stores and manages lists of open tabs, offering a more feature-rich altern… | 10 | 1753 | abandoned |
| facebookarchive/fb-flo fb-flo is a Chrome extension plus a Node.js server that lets developers modify running web apps without reloading, live-editing JavaScript,… | 10 | 1679 | abandoned |
| waynecz/dadda-translate-crx Dadda is a Chrome word-selection translation extension with a built-in vocabulary notebook and toast-based word memorization reminders. It … | 23 | 1640 | abandoned |
| keraf/NoCoin No Coin is a small browser extension for Chrome, Firefox, and Opera that blocks browser-based coin miners such as Coinhive by blacklisting … | 10 | 1573 | abandoned |
| isanchop/stuhack A Chrome extension that attempted to unlock Studocu premium features such as removing premium banners, bypassing document blur, and enablin… | 10 | 1506 | abandoned |
| fossasia/susi_firefoxbot A Firefox WebExtension that lets users chat with the SUSI.AI assistant from the browser toolbar without leaving the current tab. It is a Ja… | 32 | 1497 | abandoned |
| superSearchPlus superSearchPlus is a Chrome browser extension that aggregates information gathering for white-hat hackers, integrating common asset mapping… | 32 | 1434 | abandoned |
| anaclumos/bing-chat-for-all-browsers A browser extension that enables Bing Chat (Microsoft's ChatGPT-powered search assistant) on Chrome and Firefox, which normally restrict it… | 10 | 1423 | abandoned |
| Firebug Firebug was a legendary Firefox extension for web development that integrated HTML inspection, CSS editing, and JavaScript debugging direct… | 32 | 1370 | abandoned |
| gorhill/httpswitchboard HTTP Switchboard is a Chromium browser extension that lets users point-and-click whitelist or blacklist network requests per domain and req… | 10 | 1327 | abandoned |
| wintercn/dog-fucked-zhihu A browser plugin (userscript) that helps users quit Zhihu by backing up their answers, removing all upvotes, and batch-replacing or deletin… | 32 | 1315 | abandoned |
| petethepig/devtools-terminal A Chrome DevTools extension that embeds a system terminal inside the browser's Developer Tools panel. It connects via Chrome's Native Messa… | 32 | 1312 | abandoned |
| nang-dev/hover-paywalls-browser-extension Hover is an open-source Chrome browser extension that bypasses paywalls on news sites and blocks ads and tracking modules. It works via web… | 23 | 1309 | abandoned |
| Enhanced Steam Enhanced Steam is an open-source Chrome browser extension that enhances the Steam store experience with features like wishlist sorting, his… | 10 | 1305 | abandoned |
| Refined Twitter A browser extension that simplifies the Twitter web interface and adds quality-of-life features like hiding promoted tweets, auto-loading n… | 10 | 1296 | abandoned |
| Privacy Pass A browser extension implementing the client side of the Privacy Pass protocol, which issues and redeems unlinkable cryptographic tokens (ba… | 23 | 1250 | abandoned |
| mockko/livereload LiveReload 1.x is a browser extension and companion tool that applies CSS and JavaScript changes to Safari or Chrome without reloading the … | 32 | 1168 | abandoned |
| dannvix/NflxMultiSubs A Chrome/Firefox browser extension that adds bilingual (dual) subtitles to the Netflix web player, integrating with Netflix's native langua… | 32 | 1164 | abandoned |
| rizwansoaib/whatsapp-monitor TrackWapp is an open-source WhatsApp online-status tracker consisting of a Chrome/Firefox browser extension and companion apps that notify … | 10 | 1159 | abandoned |
| Apostolique/Agar.io-bot A userscript-based bot that plays the browser game Agar.io automatically, installed via userscript managers like Tampermonkey. It includes … | 74 | 1153 | abandoned |
| FooSoft/yomichan Yomichan is a browser extension for Chrome and Firefox that turns the browser into a Japanese pop-up dictionary, showing interactive defini… | 10 | 1142 | abandoned |
| jessepollak/command A Chrome browser extension that brings Slack-style slash commands (like /giphy, /emoji, /selfie) to any text field on the web. It lets user… | 23 | 1100 | abandoned |
| Kenguba/google-access-helper A cracked (modified) version of the 'Google Access Helper' Chrome extension that bypasses the Great Firewall to access Google services and … | 67 | 1093 | abandoned |
| eramdam/BetterTweetDeck Better TweetDeck is a browser extension that adds many quality-of-life features to TweetDeck, the Twitter/X column-based dashboard. It supp… | 10 | 1093 | abandoned |
| algolia/github-awesome-autocomplete A browser extension for Chrome, Firefox, and Safari that replaces GitHub's search bar with Algolia-powered instant search and autocomplete.… | 10 | 1071 | abandoned |
| ParticleCore/Particle YouTube Plus (codename Particle) is a browser extension/userscript that adds extra features to YouTube's HTML5 player. It runs via Greasemo… | 10 | 1052 | abandoned |
| cloudroc/baidu-nolimit A tiny Chrome extension that bypasses Baidu Netdisk's large-file download restrictions by spoofing the navigator.platform property so the w… | 32 | 1041 | abandoned |
| vladikoff/grunt-devtools A Chrome DevTools extension paired with an npm/Grunt plugin that lets developers run and monitor Grunt tasks from a dedicated Grunt tab in … | 23 | 997 | abandoned |
| ArchiveBox ArchiveBox is an open-source, self-hosted web archiving application that saves URLs, browser history, bookmarks, RSS feeds, and social medi… | 99 | 28737 | active |
| mxrch/GHunt GHunt is an offensive Google framework focused on OSINT, usable both as a CLI tool and as a Python library. It can gather information about… | 53 | 19586 | active |
| Harper Harper is an open-source, offline English grammar checker written in Rust that runs entirely on-device with millisecond lint times. It ship… | 91 | 16712 | active |
| languagetool-org/languagetool LanguageTool is an open-source proofreading engine that checks grammar, spelling, and style in 25+ languages. It ships as a Java library, a… | 77 | 15163 | stable |
| JoeanAmier/XHS-Downloader A tool for extracting links and downloading content (images, videos, live photos) from XiaoHongShu (RedNote) posts. It ships as a Python TU… | 86 | 13039 | active |
| AidLux (AidLearning) AidLux (originally AidLearning) is an AIoT development platform that runs a native Ubuntu Linux environment with GUI, deep learning tooling… | 63 | 5812 | active |
| Sourcegraph Sourcegraph is a code intelligence platform providing universal code search, code navigation, batch changes, and the Cody AI coding assista… | 10 | 10299 | maintenance |
| tianma-if/edgeever EdgeEver is an open-source, self-hosted Evernote alternative note-taking application with a classic three-pane layout, rich text/Markdown e… | 77 | 2264 | active |
| lucasastorian/llmwiki An open-source implementation of Andrej Karpathy's LLM Wiki concept: a self-maintaining personal knowledge base where an LLM (connected via… | 60 | 1701 | active |
| ZHangZHengEric/Sage Sage is a Python-based multi-agent framework and platform for planning, executing, and delivering complex tasks with LLM-powered agents. It… | 87 | 1214 | active |
| kavinsood/yaos YAOS is an Obsidian plugin plus a self-deployed Cloudflare Worker that provides real-time note synchronization using Yjs CRDT merge semanti… | 80 | 1059 | active |
| saljam/webwormhole WebWormhole is a tool that creates ephemeral, peer-authenticated WebRTC pipes between computers for sending files or data, secured with a P… | 55 | 2090 | experimental |
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