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 |
|---|---|---|---|
| ollama-ui/ollama-ui A simple HTML/JavaScript chat interface for Ollama, runnable locally via a Makefile-served page or installed as a Chrome extension. It lets… | 60 | 1125 | active |
| stevenlei/spacingjs SpacingJS is a lightweight JavaScript utility for measuring the spacing between elements on a webpage during development. It is available v… | 31 | 1125 | active |
| DownThemAll! DownThemAll! is a WebExtension download manager for Firefox, Chrome, and Edge, rebuilt from scratch as a complete re-development of the cla… | 57 | 1118 | 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 |
| 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 |
| 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 |
| rviscomi/capo.js capo.js is a tool that analyzes the ordering of elements in an HTML document's <head> to identify elements that may hurt perceived page per… | 94 | 1095 | active |
| 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 |
| zeman/perfmap PerfMap is a bookmarklet and Chrome extension that overlays a performance heatmap on a webpage, visualizing when images finished loading du… | 32 | 3761 | maintenance |
| GSConnect/gnome-shell-extension-gsconnect GSConnect is a complete implementation of the KDE Connect protocol for GNOME Shell, letting users wirelessly pair their desktop with mobile… | 97 | 3744 | 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 |
| 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 |
| 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 |
| 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 |
| rossmoody/svg-gobbler SVG Gobbler is an open-source browser extension for Chrome and Firefox that finds, optimizes, edits, and exports SVG content from any webpa… | 85 | 1052 | active |
| fhefh2015/Fast-GitHub A browser extension that accelerates GitHub downloads and access for users in China by routing traffic through faster mirrors/proxies. It w… | 40 | 3589 | maintenance |
| 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 |
| eHunter eHunter is a Tampermonkey/userscript that injects a Vue 3-based comic reader UI into supported comic sites (EH/EXHentai, NHentai), offering… | 70 | 1049 | 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 |
| arabcoders/ytptube YTPTube is a self-hosted web-based download manager and automation layer for yt-dlp. It combines scheduled tasks, metadata-driven condition… | 88 | 1033 | active |
| maxzhang666/OneKeyVip A multi-function browser userscript (compatible with Tampermonkey and ScriptCat) that bundles VIP video/music parsing, Bilibili cover fetch… | 72 | 1030 | active |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| bugcrowd/HUNT HUNT Suite is a collection of Burp Suite and OWASP ZAP proxy extensions that identify common parameters vulnerable to vulnerability classes… | 64 | 2337 | maintenance |
| nitin42/react-perf-devtool A browser developer tool extension for inspecting the rendering performance of React components, based on measures collected via the window… | 23 | 2307 | 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 |
| IBM/css-gridish CSS Gridish is a Node.js CLI tool that generates CSS Grid code with a Flexbox fallback from a JSON grid design spec, along with Sketch artb… | 10 | 2218 | 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 |
| 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 |
| 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 |
| circlestarzero/EX-chatGPT Ex-ChatGPT is a Python web application that lets ChatGPT call external APIs (Google, WolframAlpha, WikiMedia) to give more accurate, up-to-… | 10 | 1956 | 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 |
| Redux DevTools A browser extension (Chrome, Firefox, Electron) that adds Redux DevTools to the browser, enabling inspection, time-travel debugging, and ac… | 23 | 1796 | maintenance |
| sting8k/BurpSuite_403Bypasser A Burp Suite extension written in Python that automatically attempts to bypass 403 Forbidden responses on restricted directories. It hooks … | 32 | 1708 | 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 |
| Ghr07h/Heimdallr Heimdallr is a fully passive Chrome extension for security professionals that identifies high-risk vulnerability framework fingerprints in … | 23 | 1684 | 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 |
| all-in-aigc/gpts-works GPTs Works is a third-party GPTs store consisting of a website for browsing and discovering custom ChatGPT GPTs, a vector-based index syste… | 20 | 1629 | 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 |
| WICG/focus-visible A JavaScript polyfill for the CSS :focus-visible pseudo-selector, adding a focus-visible class to elements that should show a focus ring (e… | 42 | 1602 | 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 |
| 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 |
| MyEtherWallet MyEtherWallet (MEW) is a free, open-source, client-side interface for creating and managing Ethereum wallets and interacting with the Ether… | 96 | 1585 | 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 |
| 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 |
| 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 |
| iann0036/AWSConsoleRecorder A browser extension for Chrome and Firefox that records actions performed in the AWS Management Console and generates equivalent code. It o… | 10 | 1418 | maintenance |
| mrmrs/pesticide Pesticide is a small CSS stylesheet (available in vanilla CSS, Sass, Less, and Stylus) that draws colored outlines around every element on … | 57 | 1413 | maintenance |
| jaysonlong/webvideo-downloader A two-part web video downloader: a browser userscript (Violentmonkey/Tampermonkey) extracts video stream URLs from supported sites, and a P… | 32 | 1393 | 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 |
| PHP Console A PHP server library that pairs with a Google Chrome extension to handle PHP errors and exceptions, dump variables, and remotely execute PH… | 23 | 1331 | 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 |
| 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 |
| 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 |
| ttsvetko/HTML5-Desktop-Notifications A JavaScript library that polyfills the HTML5 Notification API to provide desktop notifications across Chrome, Firefox, Edge, Safari, and I… | 10 | 1204 | 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 |