Open-source browser-extensions software
537 open-source libraries, tools and applications tagged browser-extensions, ranked by how closely browser-extensions 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.
537 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| Taho Taho is a community-owned Web3 cryptocurrency wallet implemented as a browser extension, positioned as an open-source alternative to MetaMa… | 82 | 3205 | active |
| easychen/CookieCloud CookieCloud is a browser extension plus self-hosted server that syncs browser cookies and localStorage across devices with end-to-end encry… | 87 | 3171 | 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 |
| mozilla/multi-account-containers A Firefox browser extension by Mozilla that separates browsing into color-coded containers with isolated cookie storage, letting users run … | 86 | 3146 | active |
| mozilla/web-ext web-ext is Mozilla's command line tool for building, running, linting, signing, and testing WebExtensions. It streamlines Firefox extension… | 97 | 3137 | active |
| 0xCUB3/wBlock wBlock is an open-source, next-generation ad blocker built as Safari content-blocking extensions for macOS, iOS, iPadOS, and visionOS. It s… | 91 | 3075 | active |
| bpc-clone/bpc_firefox_support Support and issue-tracking repository for Bypass Paywalls Clean, a Firefox browser extension that bypasses news site paywalls. Development … | 32 | 3058 | active |
| web-scrobbler/web-scrobbler Web Scrobbler is a browser extension that scrobbles music playback history from streaming sites to services like Last.fm, Libre.fm, ListenB… | 92 | 3049 | active |
| MALSync/MALSync MAL-Sync is a browser extension and userscript that integrates MyAnimeList, AniList, Kitsu, Simkl, Shikimori, and MangaBaka into hundreds o… | 93 | 3012 | active |
| Titanium Browser for Android Titanium Browser is a secure, fully open-source Chromium-based Android browser forked from GrapheneOS's Vanadium, with support for Chrome a… | 85 | 2945 | active |
| xiao-zaiyi/illa-helper A browser extension that helps users learn languages naturally while browsing the web, based on the comprehensible input theory. It provide… | 73 | 2899 | active |
| pyllyukko/user.js A hardened user.js configuration template for Mozilla Firefox that enforces security and privacy settings. It limits tracking, fingerprinti… | 63 | 2893 | active |
| Amurex Amurex is an open-source Chrome extension that acts as an AI meeting copilot for Google Meet and MS Teams. It provides real-time suggestion… | 31 | 2873 | active |
| prasmussen/chrome-cli chrome-cli is a native macOS command line utility for controlling Google Chrome and compatible browsers (Brave, Edge, Arc, Vivaldi, etc.) v… | 48 | 2812 | active |
| anghunk/linuxdo-scripts A feature-rich browser extension for enhancing the LinuxDo forum experience, offering UI optimizations and AI-assisted features. It is publ… | 83 | 2805 | active |
| joelshepherd/tabliss Tabliss is a beautiful, customisable New Tab page browser extension for Firefox, Chrome, and Edge. It offers widgets like clocks, weather, … | 32 | 2788 | active |
| pionxzh/chatgpt-exporter A Tampermonkey userscript that adds export functionality to the ChatGPT web interface, letting users save and share their conversation hist… | 97 | 2762 | active |
| chaolucky18/xuexitongScript A Tampermonkey userscript (also runnable via browser console) that automates course video playback on the Xuexitong (Chaoxing) learning pla… | 70 | 2759 | active |
| polywock/globalSpeed Global Speed is a browser extension that provides universal speed control for video and audio across websites like YouTube, Netflix, and Sp… | 97 | 2752 | 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 |
| dimdenGD/OldTwitter A browser extension that restores the old Twitter layout from 2015 (with an optional 2018 design) by fully replacing the modern Twitter cli… | 98 | 2734 | active |
| puemos/hls-downloader A browser extension that automatically detects HTTP Live Streaming (HLS) playlists on web pages and lets users download selected video and … | 89 | 2714 | active |
| OnionBrowser/OnionBrowser Onion Browser is a free, open-source privacy-focused web browser for iPhone and iPad that tunnels web traffic through the Tor anonymity net… | 95 | 2681 | active |
| xmcp/pakku.js pakku.js is a browser extension for Chrome, Edge, and Firefox that automatically merges repeated (spam) danmaku (bullet comments) on the Ch… | 74 | 2681 | active |
| pt-plugins/PT-depiler PT-depiler is a Manifest v3 browser extension that improves efficiency when using private tracker (PT) sites, succeeding PT-Plugin-Plus. It… | 100 | 2670 | active |
| insin/control-panel-for-twitter Control Panel for Twitter is a browser extension for desktop and mobile browsers that gives users more control over their Twitter/X experie… | 95 | 2642 | active |
| greasemonkey/greasemonkey Greasemonkey is a user script manager for Firefox that lets users install and manage small scripts which customize web page behavior. It pr… | 67 | 2602 | active |
| molvqingtai/WebChat A decentralized browser extension that lets visitors of the same website chat anonymously via WebRTC peer-to-peer, end-to-end encrypted com… | 93 | 2571 | active |
| dudor/BookmarkHub BookmarkHub is a browser extension that synchronizes bookmarks across different browsers (Chrome, Firefox, Edge, and other Chromium-based b… | 53 | 2571 | active |
| gijsdev/ublock-hide-yt-shorts A uBlock Origin filter list that hides all traces of YouTube Shorts videos. It is imported into uBlock Origin's dashboard as a custom filte… | 78 | 2507 | active |
| dutiyesh/chrome-extension-cli A command-line tool that scaffolds Chrome extension projects with preconfigured Webpack, supporting JavaScript and TypeScript. It generates… | 23 | 2465 | active |
| sienori/Tab-Session-Manager Tab Session Manager is a WebExtension that saves and restores the state of browser windows and tabs, with support for automatic saving. It … | 86 | 2462 | active |
| kevmo314/magic-copy Magic Copy is a browser extension (Chrome, Firefox, and Figma) that uses Meta's Segment Anything Model to segment a foreground object from … | 21 | 2454 | active |
| dimdenGD/OldTweetDeck A browser extension that restores the classic (old) TweetDeck interface on X/Twitter. It works on Chromium-based browsers and Firefox by in… | 84 | 2442 | active |
| ccloli/E-Hentai-Downloader A userscript that downloads E-Hentai/ExHentai galleries as zip files directly from the browser. It runs via userscript managers like Tamper… | 56 | 2442 | active |
| she-llac/claude-counter A minimal browser extension (and userscript) that overlays token counts, cache countdown timers, and session/weekly usage bars on claude.ai… | 51 | 2440 | active |
| anticensority/runet-censorship-bypass A browser extension for Chromium and Firefox that bypasses internet censorship in Russia using PAC (Proxy Auto-Config) scripts. It keeps th… | 62 | 2415 | active |
| softvar/enhanced-github A browser extension for Chrome, Firefox, and Edge that enhances the GitHub website by showing repo and individual file sizes, adding downlo… | 32 | 2387 | active |
| 0x48piraj/fadblock FadBlock Origin is a browser extension that blocks YouTube ads by detecting ads and fast-forwarding through them in under 100 milliseconds,… | 10 | 2382 | 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 |
| quenhus/uBlock-Origin-dev-filter A set of uBlock Origin filter lists that hide copycat and SEO-spam websites from search results on Google, DuckDuckGo, and other engines. I… | 37 | 2324 | active |
| ajayyy/DeArrow DeArrow is an open-source browser extension that crowdsources better titles and thumbnails for YouTube videos, replacing sensationalized cl… | 94 | 2299 | active |
| Ocyss/boss-helper A browser extension (also available as a userscript) that enhances the Boss Zhipin job platform by removing ads, improving the UI, enabling… | 85 | 2249 | active |
| Nickersoft/push.js Push.js is a compact JavaScript library that wraps the browser Notifications API to show desktop notifications with cross-browser fallbacks… | 10 | 8653 | maintenance |
| Chrome++ Next Chrome++ Next is a version.dll injection (DLL hijack) that augments Google Chrome on Windows with tab enhancements, hotkey remapping, boss … | 91 | 2179 | active |
| IPFS Desktop Suite IPFS Companion is a browser extension that adds native support for ipfs:// and ipns:// addresses to Firefox, Chrome, Brave, Edge, and Opera… | 83 | 2167 | active |
| lqzhgood/wechat-need-web A Chrome/Edge/Firefox browser extension (Manifest V3) that re-enables access to WeChat's web client. It is a TypeScript refactor of the old… | 43 | 2153 | active |
| up209d/ResourcesSaverExt A Chrome browser extension that downloads all resources of a website with one click while preserving the original folder structure. It inte… | 34 | 2148 | active |
| greasyfork-org/greasyfork Greasy Fork is an open-source Ruby on Rails application that powers a public repository for user scripts and user styles, supporting discov… | 77 | 2136 | active |
| uBlock-LLC/uBlock uBlock is a fast, lightweight browser extension that blocks ads, pop-ups, and trackers in Chrome, Firefox, Safari, Edge, and Opera. It emph… | 10 | 8248 | maintenance |
| guocaoyi/create-chrome-ext A CLI scaffolding tool that generates Chrome extension starter projects with Vite-powered hot module replacement. It supports multiple fron… | 36 | 2125 | active |
| blueagler/DeepL-Helper A Chromium browser extension that unlocks DeepL free-tier restrictions, including the 5,000-character limit, editing restrictions on docume… | 41 | 2102 | active |
| ChinaGodMan/UserScripts A collection of Tampermonkey/Greasyfork userscripts modified from the internet, written in JavaScript. The scripts add browser enhancements… | 69 | 2088 | active |
| alganzory/HaramBlur HaramBlur is a browser extension that automatically detects and blurs inappropriate images and videos on web pages using on-device machine … | 19 | 2083 | active |
| Aris-t2/CustomCSSforFx A collection of custom CSS tweaks (userChrome.css/userContent.css) for customizing the Firefox browser UI. It provides prebuilt stylesheets… | 48 | 2072 | active |
| A9T9/RPA Ui.Vision RPA is an open-source robotic process automation tool delivered as a browser extension for Chrome, Edge, and Firefox, compatible … | 94 | 2064 | active |
| extesy/hoverzoom Hover Zoom+ is an open-source browser extension that enlarges images and videos to full size when you hover your mouse over them on support… | 97 | 2061 | active |
| zombieFox/nightTab nightTab is a customizable browser new tab page that replaces the default with a neutral start page accented by a chosen colour. It lets us… | 23 | 2055 | stable |
| alyssaxuu/omni Omni is a browser extension for Chrome and Firefox that provides a command-palette/spotlight-style interface for controlling your browser. … | 32 | 7855 | maintenance |
| pt-plugins/PT-Plugin-Plus PT-Plugin-Plus is a Web Extensions browser plugin for Chrome, Edge, and Firefox that streamlines using private tracker (PT) sites, enabling… | 10 | 7799 | maintenance |
| Nuklon/Steam-Economy-Enhancer A free userscript (installed via Violentmonkey) that enhances the Steam Inventory, Steam Market, and Steam Trade Offers pages. It adds bulk… | 73 | 2029 | active |
| gautamkrishnar/motrix-webextension A WebExtension that redirects browser downloads to the Motrix Download Manager via its RPC interface. It works with Chrome, Edge, Opera, an… | 97 | 2020 | active |
| Cookie-AutoDelete/Cookie-AutoDelete A Firefox, Chrome, and Edge WebExtension that automatically deletes cookies and other browsing site data when a tab closes, the domain chan… | 46 | 2016 | active |
| Notifier for GitHub A browser extension for Chrome, Firefox, Edge, Opera, and Brave that displays GitHub notification counts in the toolbar and shows desktop n… | 43 | 1984 | active |
| muckSponge/MaterialFox MaterialFox is a Material Design-inspired userChrome.css theme that restyles the Firefox browser UI to resemble Google Chrome. It is instal… | 32 | 1961 | active |
| autoDecoder A modified version of the captcha-killer Burp Suite extension that intercepts captcha images from HTTP responses and recognizes them using … | 36 | 1954 | active |
| aeonfun/opendia OpenDia is an open-source browser extension (npm package) that connects your Chrome, Arc, or Firefox browser to AI models via the Model Con… | 86 | 1927 | active |
| Rabby Wallet Rabby Wallet is an open-source browser extension wallet for Ethereum and all EVM-compatible chains, aimed at DeFi users. It injects a stand… | 93 | 1898 | active |
| Justineo/github-hovercard A browser extension that adds neat hovercards to GitHub, showing instant user, repo, issue, and commit information on hover. Available for … | 10 | 1890 | active |
| younesaassila/ttv-lol-pro TTV LOL PRO is a browser extension that removes most livestream ads from Twitch by routing streams through standard HTTP proxies. It is a f… | 78 | 1889 | active |
| sindresorhus/screenfull A tiny (0.7 kB gzipped) JavaScript library that wraps the browser Fullscreen API, normalizing vendor-prefixed implementation differences. I… | 66 | 7138 | maintenance |
| mumuy/browser A JavaScript library for user-agent analysis and browser detection that identifies browser, engine, OS, device, GPU, network, and other cli… | 75 | 1884 | active |
| zhu1090093659/deepseek-pp DeepSeek++ is an open-source browser extension for Chrome, Edge, and Firefox that turns the DeepSeek web app into an AI agent workspace. It… | 10 | 1870 | 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 |
| webpilot-ai/Webpilot Webpilot is a free, open-source browser extension that acts as a 'Copilot for the web', letting users converse with web page content withou… | 72 | 1859 | active |
| Alanrk/LazyCat-Bookmark-Cleaner A browser extension (Chrome and Edge) that intelligently cleans and organizes bookmarks by detecting invalid links, duplicates, and empty f… | 46 | 1852 | active |
| muaz-khan/RecordRTC RecordRTC is a server-less, client-side JavaScript library for recording WebRTC audio, video, screen, and canvas media streams directly in … | 23 | 6919 | maintenance |
| zarazhangrui/tab-out Tab Out is a Chrome extension (Manifest V3) that replaces the new tab page with a dashboard of all open tabs, grouped by domain with homepa… | 46 | 1806 | 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 |
| Augmented Steam Augmented Steam is a browser extension for Chrome, Firefox, and Edge that enhances the Steam platform with price history, ownership highlig… | 99 | 1785 | 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 |
| VideoTogether/VideoTogether VideoTogether is a browser extension that synchronizes video playback across devices so friends and family can watch videos together remote… | 62 | 1779 | active |
| adsbypasser/adsbypasser AdsBypasser is a lightweight userscript that automatically skips countdown ads, continue/redirect pages, and prevents ad pop-up windows acr… | 99 | 1775 | active |
| ken107/read-aloud Read Aloud is a browser extension for Chrome, Firefox, and Edge that reads aloud webpage content using text-to-speech with one click. It wo… | 68 | 1772 | active |
| ghostery/ghostery-extension Ghostery is a browser extension that blocks ads, trackers, and cookie pop-ups across Firefox, Chrome, Opera, Edge, Safari, and Yandex. It p… | 95 | 1755 | active |
| Better xCloud Better xCloud is a userscript (and companion Android app) that enhances the Xbox Cloud Gaming experience on xbox.com/play, adding features … | 85 | 1751 | active |
| clmtrackr clmtrackr is a JavaScript library for fitting facial models to faces in videos or images using Constrained Local Models with regularized la… | 23 | 6500 | maintenance |
| LauZzL/doubao-downloader A browser extension and Tampermonkey userscript for batch-downloading watermark-free images and videos generated by the Doubao (Dola) AI ch… | 84 | 1740 | active |
| guybedford/es-module-shims A browser polyfill library that adds modern ES modules features like import maps, JSON/CSS/Wasm modules, import defer, and TypeScript type … | 92 | 1734 | active |
| xbrowsersync/app xBrowserSync is a free, privacy-focused tool for syncing browser data (bookmarks, settings, etc.) between different browsers and devices. T… | 62 | 1732 | active |
| bhollis/jsonview JSONView is a WebExtension for Firefox, Chrome, and Edge that pretty-prints JSON documents in the browser with syntax highlighting and coll… | 61 | 1731 | active |
| mandatoryprogrammer/CursedChrome CursedChrome is a Chrome extension implant that converts a victim's Chrome browser into a fully-functional HTTP proxy, letting an operator … | 32 | 1727 | active |
| interstellard/chatgpt-advanced WebChatGPT is a browser extension for Chrome, Firefox, and Edge that augments ChatGPT (and later Claude/Gemini) prompts with real-time web … | 23 | 6428 | maintenance |
| KiKaraage/ArcWTF ArcWTF is a userChrome.css theme that recreates the Arc Browser look and feel inside Firefox, using Firefox's native vertical tabs and side… | 37 | 1719 | active |
| djipco/webmidi WEBMIDI.js is a JavaScript library that simplifies interaction with the Web MIDI API in browsers and Node.js. It provides user-friendly fun… | 88 | 1716 | stable |
| Rob--W/crxviewer A browser add-on and web app for viewing the source code of Chrome, Firefox, Opera, Edge, and Thunderbird extensions without installing the… | 74 | 1716 | active |
| Moustachauve/cookie-editor Cookie-Editor is an open-source browser extension for creating, editing, deleting, importing and exporting cookies on the current tab. It w… | 64 | 1705 | active |
| saeedezzati/superpower-chatgpt Superpower ChatGPT is a browser extension for Chrome and Firefox that adds workspace features to the ChatGPT web interface, including folde… | 30 | 1704 | active |
| Bromite Bromite is a Chromium fork for Android with a built-in ad-blocking engine and privacy enhancements such as anti-fingerprinting flags, DNS-o… | 23 | 6319 | maintenance |