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 |
|---|---|---|---|
| Stay Stay is an open-source local userscript manager implemented as a Safari extension for iOS and iPadOS, compatible with Tampermonkey/Greasemo… | 23 | 1311 | active |
| harshjv/github-repo-size A Chrome extension that displays a GitHub repository's size directly in the repository summary. It uses the GitHub API and supports private… | 10 | 1302 | active |
| passff/passff PassFF is a Mozilla Firefox extension that provides browser access to a zx2c4 pass password store. It can list, fill, and submit login form… | 64 | 1290 | active |
| honestbleeps/Reddit-Enhancement-Suite Reddit Enhancement Suite (RES) is a community-driven, GPLv3-licensed browser extension that adds many quality-of-life modules to Reddit, su… | 92 | 4525 | maintenance |
| huhu/rust-search-extension A browser extension for Chrome, Firefox, and Edge that provides instant search of Rust documentation, crates, builtin attributes, books, an… | 86 | 1271 | active |
| YouG-o/YouTube-No-Translation A browser extension that prevents YouTube from automatically translating video titles, descriptions, thumbnails, subtitles, and audio track… | 82 | 1263 | active |
| crittermike/shortkeys Shortkeys is a cross-browser extension (Chrome, Firefox, Edge, Opera) for creating custom keyboard shortcuts with 125+ built-in actions lik… | 89 | 1255 | active |
| SteamDB SteamDB's official browser extension for Chrome, Firefox, and Edge that enhances Steam store and community websites. It adds SteamDB links … | 73 | 1240 | active |
| privacytests/privacytests PrivacyTests is an open-source testing program that runs automated privacy audits against popular web browsers, measuring leaks like state … | 75 | 1226 | active |
| Clean Flash A repository of clean, spyware-free builds of Adobe Flash Player, stripped of the bundled adware and telemetry found in the Chinese Flash v… | 74 | 1222 | active |
| Sak32009/GetDataFromSteam-SteamDB A userscript that extracts game and DLC data from Steam store pages and SteamDB. It runs via userscript managers like Tampermonkey or Viole… | 74 | 1214 | active |
| rNeomy/auto-tab-discard Auto Tab Discard is a browser extension that uses the native tab discarding API (chrome.tabs.discard) to automatically discard inactive tab… | 65 | 1212 | active |
| coolpace/V2EX_Polish V2EX Polish is a lightweight browser extension (also available as a userscript) that enhances the V2EX forum with a modernized UI, nested c… | 53 | 1210 | active |
| callumlocke/json-formatter A Chrome browser extension that formats and pretty-prints JSON API responses with syntax highlighting, collapsible trees, dark mode, and co… | 76 | 4134 | maintenance |
| hoothin/SearchJumper SearchJumper is an open-source browser extension (also available as a userscript) for quickly switching between search engines and searchin… | 76 | 1178 | active |
| ccd0/4chan-x 4chan X is a userscript that adds features like thread watching, quote linking, and inline image expansion to anonymous imageboards such as… | 73 | 1158 | active |
| JingMatrix/ChromeXt An Xposed module that adds UserScript and DevTools support to Chromium-based and WebView-based Android browsers. It hooks into browser inte… | 89 | 1150 | active |
| platonai/Browser4 Browser4 is an AI-native browser engine built in Kotlin for autonomous agents, intelligent data extraction, and large-scale web automation.… | 93 | 1145 | active |
| DevLARLEY/WidevineProxy2 A browser extension (Chrome and Firefox, Manifest V3) that proxies Widevine and ClearKey EME challenges and license messages, modifying cha… | 85 | 1143 | active |
| nonbili/Nora Nora is an open-source SNS browser for Android, iOS, and desktop that wraps social network websites (Facebook, Instagram, Reddit, Threads, … | 82 | 1142 | active |
| osnr/TabFS TabFS is a browser extension that mounts your open browser tabs as a filesystem on your computer, mapping each tab to a folder whose files … | 32 | 3937 | maintenance |
| antfu/broz broz is a minimal, frameless Electron-based browser designed for taking clean screenshots of web pages. It is launched from the command lin… | 80 | 1136 | active |
| alexadam/save-as-ebook A Chrome/Firefox/Opera Web Extension that saves a web page or a text selection as an eBook in .epub format. It supports collecting multiple… | 94 | 1126 | active |
| bilibili-helper/bilibili-helper-o Bilibili Helper is a Chrome browser extension that enhances bilibili.com by replacing the video player, bypassing playback restrictions, se… | 23 | 3855 | maintenance |
| xob0t/Google-Photos-Toolkit A TypeScript userscript that adds bulk filtering, searching, organizing, and deletion capabilities to Google Photos via its undocumented we… | 87 | 1116 | active |
| shy1132/VacuumTube VacuumTube is an unofficial Electron-based desktop wrapper of YouTube Leanback, the official YouTube interface for consoles and Smart TVs. … | 83 | 1102 | active |
| wtetsu/mouse-dictionary Mouse Dictionary is a super fast browser extension that shows dictionary definitions instantly when you select or hover over words on web p… | 88 | 1100 | active |
| josh-berry/tab-stash Tab Stash is a Firefox extension that saves and organizes batches of open tabs as bookmarks, letting users clear their tab bar and restore … | 77 | 1095 | active |
| Dot Browser Dot Browser is a privacy-focused web browser built on Firefox's Gecko engine, with releases for Windows, macOS, Linux, and Android. This re… | 23 | 1087 | 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 |
| BuilderIO/figma-html A tool (Figma plugin and Chrome extension) by Builder.io that converts any website's HTML into editable Figma designs. The original reposit… | 45 | 3698 | maintenance |
| 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 |
| LocoreMind/locoagent LocoAgent is an AI-powered social media agent that autonomously operates real accounts through genuine browser automation via Chrome DevToo… | 67 | 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 |
| cantino/selectorgadget SelectorGadget is an open-source bookmarklet and Chrome extension that generates CSS selectors for page elements through point-and-click se… | 66 | 1061 | 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 |
| 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 |
| F2etest F2etest is a self-hosted multi-browser compatibility testing solution from Alibaba that provides a cloud of real browsers via Guacamole HTM… | 32 | 3559 | maintenance |
| sharpbrowser/SharpBrowser SharpBrowser is a full-featured open-source web browser for Windows built in C# on the CefSharp (Chromium Embedded Framework) engine. It of… | 36 | 1027 | 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 |
| 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 |
| cbingb666/115master A userscript (Tampermonkey/ScriptCat) that enhances the 115 cloud drive web interface with an upgraded video player, improved file lists, a… | 73 | 1013 | active |
| pea3nut/Pxer Pxer is a userscript (installed via Tampermonkey) that acts as a crawler for pixiv.net, letting users batch-fetch artworks, collections, an… | 23 | 1010 | active |
| sonnyp/Tangram Tangram is a GNOME desktop application that acts as a browser for pinned tabs, letting users organize web applications into persistent, san… | 66 | 1005 | stable |
| 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 |
| alixaxel/chrome-aws-lambda A TypeScript library that ships a size-optimized Chromium binary designed to run headless browser automation with Puppeteer (or Playwright)… | 32 | 3284 | maintenance |
| cztomczak/cefpython CEF Python provides Python bindings for the Chromium Embedded Framework, letting Python applications embed a full Chromium-based browser. I… | 67 | 3237 | maintenance |
| 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 |
| schmich/instascan Instascan is a JavaScript library that provides real-time QR code scanning from a webcam feed in the browser, built on top of ZXing compile… | 23 | 3022 | 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 |
| 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 |
| wexond/browser-base Wexond is a modern, feature-rich web browser built on Electron and React, designed to be lighter than full Chromium by stripping Google ser… | 10 | 2718 | maintenance |
| CodFrm/cxmooc-tools A browser extension and Tampermonkey userscript that automates coursework on Chinese MOOC platforms including Chaoxing (Xuexitong), Zhihuis… | 10 | 2698 | maintenance |
| martenbjork/github-xp A browser extension that restyles GitHub with Windows XP visual flair, including a Clippy-style assistant. It was distributed via the Chrom… | 51 | 2652 | maintenance |
| TransitApp/SVWebViewController SVWebViewController is a drop-in inline browser view controller for iOS apps, written in Objective-C. It provides a ready-made web browsing… | 32 | 2549 | 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 |
| 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 |
| LBRY Android The official LBRY Android app, a mobile browser and wallet for the LBRY decentralized content network. It lets users discover, view, publis… | 23 | 2393 | maintenance |
| oct16/TimeCat TimeCat is an open-source web page recording library that captures browser interactions (DOM, canvas, audio, mouse, scroll) and replays the… | 32 | 2302 | 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 |
| 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 |
| itgoyo/Aria2 A curated collection of tutorials and tools for bypassing Baidu Netdisk download speed limits, centered on the aria2 download utility and i… | 32 | 2112 | 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 |
| JakeWharton/SdkSearch An Android app and Chrome extension for quickly searching the Android SDK documentation. It provides fast lookup of Android API reference e… | 10 | 2047 | maintenance |
| Mottie/GitHub-userscripts A collection of JavaScript userscripts that add extra functionality to GitHub, such as code folding, table of contents, diff filters, custo… | 32 | 2031 | 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 |
| 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 |
| nat/natbot natbot is a Python tool that drives a web browser using GPT-3, letting an LLM agent navigate and interact with web pages. It serializes the… | 32 | 1933 | 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 |
| Firefox for Android Fenix is the open-source Firefox for Android browser, built on GeckoView and Mozilla Android Components in Kotlin. The project has migrated… | 10 | 1839 | 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 |
| 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 |
| 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 |
| mrishab/google-photos-delete-tool A JavaScript script run in the browser developer console that bulk-deletes all photos from a Google Photos account. It automates the deleti… | 32 | 1557 | 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 |
| 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 |
| eqcss/eqcss EQCSS is a JavaScript-based CSS reprocessor that adds element queries (@element), scoped CSS, a parent selector, and responsive JavaScript … | 23 | 1488 | 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 |
| fingerprintjs/BotD BotD is a free, MIT-licensed browser library that detects automation tools and frameworks such as Puppeteer, Selenium, Playwright, and head… | 68 | 1480 | 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 |
| 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 |
| 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 |
| huaying/instagram-crawler A Python command-line crawler that scrapes Instagram posts, profiles, and hashtag data using Selenium and ChromeDriver, without the officia… | 32 | 1362 | 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 |
| 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 |
| 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 |