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 |
|---|---|---|---|
| xuejianxianzun/PixivFanboxDownloader A Chrome browser extension for batch downloading files from Pixiv Fanbox posts. It supports file type filtering, custom filenames, multiple… | 95 | 1094 | active |
| webrtcHacks/adapter adapter.js is a JavaScript shim that insulates WebRTC applications from spec changes and browser prefix/behavior differences. It normalizes… | 83 | 3747 | maintenance |
| Cinvin/myuserscripts A Tampermonkey userscript for NetEase Cloud Music's web player that adds song downloading, cloud-disk transfer, fast cloud-disk upload, and… | 72 | 1082 | active |
| hmjz100/123panYouthMember A Tampermonkey/Greasemonkey userscript that simulates 123pan (123 云盘) cloud drive membership features in the browser, including downloads o… | 43 | 1082 | active |
| aclap-dev/video-downloadhelper Video DownloadHelper is a browser extension for Chrome, Firefox, and Edge that detects and downloads video and audio content from thousands… | 42 | 1081 | active |
| Kiuryy/Bookmark_Sidebar A browser extension that adds a toggleable sidebar displaying all bookmarks on the left or right edge of the screen, with sorting, editing,… | 69 | 1079 | active |
| jasonlong/isometric-contributions A browser extension for Chrome, Firefox, and Edge that renders an isometric pixel art version of your GitHub contribution graph using obeli… | 98 | 3700 | maintenance |
| yize/xswitch XSwitch is a Chrome browser extension for redirecting and forwarding request URLs using browser-native APIs, with rule groups, CORS support… | 78 | 1077 | active |
| LeechBlock NG LeechBlock NG is a free browser extension for Firefox, Chrome, Edge, and other Chromium-based browsers that blocks time-wasting websites ac… | 90 | 1067 | active |
| translate-tools/linguist Linguist is a privacy-first browser extension for Chrome and Firefox that translates web pages, selected text, subtitles, and messages, wit… | 93 | 1065 | active |
| 0xlau/biliplus BiliPlus is a browser extension for Chrome, Edge, and Firefox that improves the user experience on bilibili.com with small quality-of-life … | 88 | 1065 | active |
| kui123456789/free-account-tool A Chrome Manifest V3 browser extension that automates email-based account registration with 2FA, Passkey, and Access Token/Session manageme… | 72 | 1064 | active |
| mantou132/Spotify-Lyrics A browser extension that adds instant synchronized lyrics to the Spotify Web Player, displayed in a Picture-in-Picture window. It fetches l… | 92 | 1062 | active |
| QingJ01/123pan_unlock A Tampermonkey userscript that unlocks download restrictions on the 123pan (123云盘) cloud storage service, including bypassing the 1GB downl… | 10 | 1060 | active |
| leon-kfd/Dashboard Howdz Dashboard is a fully customizable browser start page built with Vue 3, TypeScript, and Vite, available as a web app and as Chrome, Ed… | 61 | 1051 | active |
| ChenYCL/chrome-extension-udemy-translate A Chrome extension that translates video subtitles on any website in real time, with support for custom DOM selectors per site. It supports… | 49 | 1048 | active |
| jaywcjlove/iNotify A tiny dependency-free JavaScript library that provides browser notifications via title flashing, scrolling, voice prompts, and native Chro… | 56 | 1047 | active |
| Clipboard A tiny (0.2 kB) JavaScript library for copying text to the clipboard in modern browsers. It works in non-secure contexts where the native n… | 77 | 1045 | stable |
| maxzhang666/OneKeyVip A multi-function browser userscript (compatible with Tampermonkey and ScriptCat) that bundles VIP video/music parsing, Bilibili cover fetch… | 72 | 1030 | active |
| outdatedbrowser/outdated-browser A lightweight JavaScript plugin that detects outdated browsers and displays a styled notice advising users to upgrade. It is embedded in we… | 32 | 3486 | maintenance |
| Robbendebiene/Gesturefy Gesturefy is a customizable Firefox add-on that lets users execute browser commands via mouse gestures, rocker gestures, and wheel gestures… | 93 | 1025 | active |
| Browserpass Browserpass is a browser extension for zx2c4's pass (the UNIX password store) that auto-fills or copies credentials for the current domain,… | 83 | 1021 | active |
| babyman/quick-tabs-chrome-extension Quick Tabs is a Chrome browser extension that provides a keyboard-driven popup for switching between open tabs in most-recently-used order,… | 48 | 1021 | active |
| polkadot-js/extension A browser extension for Chrome and Firefox that manages Polkadot and Substrate network accounts and signs transactions (extrinsics) with th… | 94 | 1020 | 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 |
| OpenUserJS/OpenUserJS.org OpenUserJS.org is an open source website and repository for hosting, sharing, and discovering FOSS user scripts (Greasemonkey/Tampermonkey-… | 66 | 1008 | active |
| FirefoxCSS-Store/FirefoxCSS-Store.github.io A static community catalog website for discovering and sharing Firefox userChrome.css themes, curated from the FirefoxCSS Reddit community.… | 77 | 1002 | active |
| MichaelYuhe/ai-group-tabs A Chrome extension that uses AI (OpenAI API) to automatically organize and group browser tabs into categories. Users can customize categori… | 18 | 1000 | active |
| JackyAndroid/AndroidChromium An Android Studio project packaging the Chromium (Chrome for Android) browser source so developers can build, debug, and study the Chrome A… | 23 | 3144 | maintenance |
| arielsalminen/feature.js Feature.js is a fast, dependency-free 1kb browser feature detection library written in plain JavaScript. It lets developers test for capabi… | 32 | 3139 | maintenance |
| Kiwi Browser Kiwi Browser is a fully open-source web browser for Android based on Chromium, with support for Chrome extensions, Night Mode, and a bottom… | 10 | 2972 | maintenance |
| EdgeTranslate/EdgeTranslate Edge Translate is a browser extension for translating selected text and entire web pages, supporting Chrome, Firefox, Edge, and QQ Browser.… | 23 | 2904 | maintenance |
| truedread/netflix-1080p A Chrome extension that unlocks 1080p video and 5.1 surround audio playback on Netflix in the desktop Chrome browser. It works by patching … | 23 | 2744 | maintenance |
| segmentio/daydream Daydream is a Chrome extension that records your browser actions and generates a Nightmare or Puppeteer script from them. It supports recor… | 10 | 2744 | maintenance |
| televator-apps/vimari Vimari is a Safari extension that provides vim-style keyboard navigation, letting users scroll, open links, and control Safari without a mo… | 23 | 2731 | maintenance |
| CodFrm/cxmooc-tools A browser extension and Tampermonkey userscript that automates coursework on Chinese MOOC platforms including Chaoxing (Xuexitong), Zhihuis… | 10 | 2698 | maintenance |
| streamproc/MediaStreamRecorder MediaStreamRecorder.js is a cross-browser JavaScript library for recording audio, video, screen, and canvas streams using the MediaRecorder… | 23 | 2676 | maintenance |
| ragingwind/generator-chrome-extension A Yeoman generator that scaffolds Chrome extension projects, generating boilerplate with a choice of browser UI types (browser/page action,… | 23 | 2632 | maintenance |
| jhuckaby/webcamjs WebcamJS is a JavaScript library for capturing images from a user's webcam in the browser using HTML5 getUserMedia, with a Flash fallback f… | 23 | 2511 | maintenance |
| zerodytrash/Simple-YouTube-Age-Restriction-Bypass A browser extension and userscript that bypasses YouTube's age verification, letting users watch age-restricted videos without signing in. … | 26 | 2468 | maintenance |
| schmich/marinara Marinara is an open-source Chrome browser extension that implements the Pomodoro Technique for time management. It provides configurable wo… | 23 | 2456 | maintenance |
| Ibit-to/google-unlocked Google Unlocked is an open-source browser extension that reveals Google search results hidden due to takedown complaints. It scans Google's… | 23 | 2393 | maintenance |
| timdown/rangy Rangy is a cross-browser JavaScript library for working with DOM ranges and text selections. It normalizes browser inconsistencies and prov… | 48 | 2296 | maintenance |
| 1995eaton/chromium-vim cVim is a Chrome extension that adds Vim-style keyboard bindings and a command bar to Google Chrome. It supports custom mappings, link hint… | 32 | 2255 | maintenance |
| jackspirou/clientjs ClientJS is a pure JavaScript library for browser device fingerprinting and device information gathering. It generates a 32-bit integer fin… | 23 | 2228 | maintenance |
| SimonBrazell/privacy-redirect A browser extension that redirects requests to Twitter, YouTube, Instagram, Google Maps, Reddit, Google Search, and Google Translate to pri… | 10 | 2190 | maintenance |
| sindresorhus/devtools-detect A small JavaScript library that detects whether browser DevTools is open and its orientation, emitting a 'devtoolschange' event on changes.… | 10 | 2132 | maintenance |
| Naezr/ShyFox ShyFox is a Firefox userChrome CSS theme that hides the entire browser interface into the window border for an ultra-minimal look, with ver… | 26 | 2123 | maintenance |
| einaregilsson/Redirector Redirector is a browser extension for Firefox, Chrome, Edge, Vivaldi and Opera that redirects URLs based on regex or wildcard patterns, lik… | 44 | 2094 | maintenance |
| pfn/keepasshttp KeePassHttp is a plugin for KeePass 2.x that exposes password entries securely over HTTP using 256-bit AES/CBC encryption. It is designed t… | 32 | 2038 | maintenance |
| Shpigford/knockoff A browser extension that filters pseudo-brand junk out of Amazon search results by detecting trademark-squat brand names and hiding, dimmin… | 70 | 2023 | maintenance |
| ETCExtensions/Edit-This-Cookie EditThisCookie is a Google Chrome/Chromium browser extension for managing cookies. It lets users add, delete, edit, search, protect, and bl… | 23 | 2004 | maintenance |
| bigemon/ChatGPT-ToolBox A ChatGPT toolbox userscript/browser extension written largely by ChatGPT itself, injectable via Tampermonkey or Chrome bookmarklets. It ad… | 32 | 2001 | maintenance |
| gongjunhao/seckill A Chrome browser extension that helps users automate flash-sale and rush purchases by scheduling timed auto-clicks on any website's buy but… | 23 | 1947 | maintenance |
| thegreatjavascript/FakeScreenshot A Chrome browser extension that lets users edit the text and images of any website and take screenshots of the modified page. Its purpose i… | 32 | 1940 | maintenance |
| jae-jae/Userscript-Plus Userscript+ is a Tampermonkey user script (also available as a Chrome/Firefox extension) that automatically discovers UserJS available for … | 32 | 1930 | maintenance |
| mourner/bullshit.js Bullshit.js is a JavaScript bookmarklet that translates corporate marketing jargon into plain, human-readable text on any web page. It runs… | 47 | 1899 | maintenance |
| migueravila/simplefox A minimalist, keyboard-centered userstyle theme for Firefox built with userChrome.css. It customizes the Firefox UI with commented code and… | 10 | 1865 | maintenance |
| ai/visibilityjs Visibility.js is a JavaScript wrapper around the browser Page Visibility API that hides vendor prefixes and adds high-level helpers. It let… | 23 | 1840 | maintenance |
| intika/Librefox Librefox is a privacy- and security-hardened packaging of Firefox that applies 500+ settings, patches, and optional addons without forking … | 23 | 1782 | maintenance |
| que-etc/resize-observer-polyfill A lightweight (2.44 KiB gzipped) polyfill/ponyfill for the browser Resize Observer API, implemented with MutationObserver and Mutation Even… | 23 | 1751 | maintenance |
| zlwaterfield/scramble Scramble is an open-source browser extension that uses LLMs to enhance writing directly on any webpage, acting as a customizable Grammarly … | 32 | 1688 | maintenance |
| wingify/across-tabs AcrossTabs is a small (~4 KB gzipped) JavaScript library that enables safe communication between cross-origin browser tabs using the PostMe… | 32 | 1671 | maintenance |
| leggett/simplify Issue tracker repository for Simplify Gmail, a browser extension that simplifies and enhances Gmail's interface. The extension itself is no… | 32 | 1636 | maintenance |
| und3fined/medium-unlocker A browser extension that unlocks Medium.com member-only articles by bypassing Medium's GraphQL-based paywall. It serves as a replacement fo… | 23 | 1614 | maintenance |
| cascadefox/cascade Cascade is a minimalistic, keyboard-centered userChrome CSS theme for Firefox that removes interface clutter. It is customizable in colors … | 57 | 1607 | maintenance |
| muleyo/VideoAdBlockForTwitch A browser extension that blocks ads on Twitch.tv by temporarily switching to an ad-free 480p stream during ad breaks and restoring original… | 23 | 1602 | maintenance |
| robb0wen/tornis Tornis is a minimal JavaScript library that watches and tracks the state of the browser's viewport, including mouse position, scroll positi… | 32 | 1589 | maintenance |
| gildas-lormeau/JSONVue JSONVue is a Chromium browser extension that formats and displays JSON responses in a readable, highlighted view instead of raw text. It is… | 32 | 1586 | maintenance |
| fossasia/susi_chromebot A Chrome browser extension that provides access to the SUSI.AI assistant without leaving the current tab. It opens via toolbar icon or Alt+… | 10 | 1545 | maintenance |
| akahuku/wasavi wasavi is a browser extension for Chrome, Firefox, and Opera that transforms any TEXTAREA element into a virtual vi editor supporting most … | 23 | 1543 | maintenance |
| andris9/jStorage jStorage is a small cross-browser key-value store library for persisting data locally in the browser, supporting strings, numbers, objects,… | 32 | 1524 | maintenance |
| toolkit-for-ynab/toolkit-for-ynab Toolkit for YNAB is a browser extension that enhances the YNAB web application with user-configurable features for Chrome, Firefox, and Edg… | 95 | 1511 | maintenance |
| jordwest/news-feed-eradicator A browser extension that removes news feeds from social media sites and replaces them with an inspirational quote. It is built as a standar… | 83 | 1507 | maintenance |
| panicsteve/cloud-to-butt A Chrome browser extension that replaces occurrences of the phrase 'the cloud' with 'my butt' on web pages. It is a novelty joke extension … | 32 | 1503 | maintenance |
| mrcoles/full-page-screen-capture-chrome-extension A Google Chrome extension that captures a full-page screenshot of any web page with one click. It scrolls and stitches the page into a sing… | 72 | 1502 | maintenance |
| ageitgey/show-facebook-computer-vision-tags A simple Chrome extension that overlays the automated computer vision tags Facebook generates for images directly on your Facebook timeline… | 32 | 1485 | maintenance |
| liady/ChatGPT-pdf A Chrome and Firefox browser extension that adds export buttons to the ChatGPT web interface, letting users download chat history as PNG im… | 23 | 1477 | maintenance |
| Synzvato/decentraleyes Decentraleyes is a browser extension that emulates content delivery networks by serving popular CDN-hosted libraries (like JavaScript frame… | 10 | 1464 | maintenance |
| ttalvitie/browservice Browservice is a proxy server that renders modern web pages using an embedded Chromium (CEF) browser and streams the viewport as images to … | 76 | 1454 | maintenance |
| dxa4481/Pastejacking A proof-of-concept demo of pastejacking: using JavaScript to override a user's clipboard contents when they copy text from a webpage, trick… | 32 | 1437 | maintenance |
| akhodakivskiy/VimFx VimFx is a Firefox extension that adds Vim-style keyboard shortcuts for browsing and navigation, enabling a near mouseless experience. It i… | 93 | 1431 | maintenance |
| OpnTec/libredesktop-meta A meta package for customizing the 'libredesktop' setup, focused on configuring Firefox browser settings such as custom search engines, new… | 32 | 1387 | maintenance |
| fossasia/Connect-Me Connect-Me is a Chrome and Firefox browser extension for connecting with the FOSSASIA community. It helps users star FOSSASIA repositories,… | 10 | 1375 | maintenance |
| martinsbalodis/web-scraper-chrome-extension Web Scraper is a Chrome browser extension for extracting data from web pages without writing code. Users define sitemaps describing how to … | 32 | 1363 | maintenance |
| fransr/postMessage-tracker A Chrome extension that tracks postMessage listener usage across a page and its subframes, showing listener counts via the extension icon a… | 32 | 1334 | maintenance |
| alexgibson/notify.js Notify.js is a small JavaScript wrapper around the Web Notifications API that simplifies requesting user permission and handling notificati… | 10 | 1324 | maintenance |
| ParticleCore/Iridium Iridium is a browser extension for Firefox and Chrome that enhances the YouTube experience with additional features and tweaks. It is distr… | 10 | 1324 | maintenance |
| csns1/bypass-paywalls-chrome-clean-magnolia1234 A Chromium browser extension that bypasses paywalls on supported news sites, allowing users to read articles for free. It supports custom s… | 32 | 1321 | maintenance |
| overdodactyl/ShadowFox ShadowFox is a universal dark theme for Firefox built with userChrome.css and userContent.css, styling the entire browser UI, protected abo… | 32 | 1304 | maintenance |
| muan/github-gmail A browser extension for Chrome and Firefox that adds keyboard shortcuts to Gmail for opening and muting GitHub notification emails. It stre… | 23 | 1265 | maintenance |
| Mechazawa/FuckFuckAdblock A single-file userscript that impersonates the FuckAdBlock.js adblock-detection library but always reports that no adblocker is present, so… | 10 | 1257 | maintenance |
| mozilla-mobile/focus-ios Firefox Focus for iOS is an open-source privacy-focused mobile web browser that automatically blocks online trackers and lets users erase h… | 10 | 1250 | maintenance |
| suxiaogang/WeiboPicBed A Chrome extension that lets users upload images to Sina Weibo's image hosting service and get direct URLs. It supports pasting, dragging, … | 10 | 1243 | maintenance |
| h264ify A Chrome/Firefox/Edge browser extension that forces YouTube to stream H.264 video instead of VP8/VP9. It improves playback performance on m… | 33 | 1239 | maintenance |
| jiangqizheng/BlueSea BlueSea is a browser extension for English learning that offers word selection translation, word highlighting, word danmaku (bullet comment… | 32 | 1232 | maintenance |
| Mapaler/PixivUserBatchDownload A userscript (browser extension-style script) that batch-downloads all public works of a Pixiv artist directly from the Pixiv website, send… | 44 | 1198 | maintenance |
| thieman/github-selfies A browser extension for Chrome and Firefox that lets users attach webcam selfies to GitHub pull requests, comments, and issues. It injects … | 32 | 1194 | maintenance |
| Web Components Polyfills A suite of polyfills that implement the HTML Web Components specs (custom elements, shadow DOM, HTML imports) for browsers lacking native s… | 76 | 1188 | 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 |