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 |
|---|---|---|---|
| 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 |
| glidea/banana-prompt-quicker A Chrome extension that lets users quickly insert curated and custom prompts into Google AI Studio, Gemini, and any website input box via r… | 58 | 2414 | 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 |
| lcomplete/huntly Huntly is a self-hosted, AI-powered personal information hub that captures, archives, and organizes web content, RSS feeds, tweets, and hig… | 81 | 2348 | 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 |
| easychen/checkchan-dist Check酱 (CheckChan) is a web page content change monitoring tool consisting of a Chrome/Edge browser extension and a self-hostable cloud com… | 32 | 2323 | 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 |
| open-source-labs/Reactime Reactime is an open-source Chrome extension for React applications that provides time-travel debugging through state snapshots and comprehe… | 63 | 2240 | active |
| AntiDebug_Breaker A Chrome browser extension built on the Hook_JS library that assists with JavaScript reverse engineering and penetration testing reconnaiss… | 83 | 2203 | active |
| opennaslab/kubespider Kubespider is a self-hosted download orchestration system that turns an idle Linux server into a NAS download center. It uses pluggable sou… | 54 | 2190 | 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 |
| 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 |
| 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 |
| victrme/Bonjourr Bonjourr is a minimalist, iOS-inspired startpage that replaces the new tab page in Chrome, Firefox, Edge, and Safari. It offers dynamic cur… | 92 | 2094 | 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 |
| Xtreme Download Manager Xtreme Download Manager (XDM) is a cross-platform desktop application that accelerates downloads up to 5x via dynamic file segmentation and… | 66 | 7953 | maintenance |
| 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 |
| baiy/Ctool Ctool is a multi-platform Swiss-army toolbox of common developer utilities including hashing, encryption/decryption, encoding, JSON/YAML/XM… | 34 | 2050 | active |
| 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 |
| daymade/Twitter-Block-Porn A Tampermonkey/Greasemonkey userscript that batch-blocks Twitter/X accounts from shared blocklists of porn-spam scammers. It simulates Twit… | 74 | 2029 | active |
| 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 |
| Jamailar/Beav Beav (formerly RedBox) is a local-first AI content operations workbench for social media creators, combining a desktop app and a Chrome/Edg… | 82 | 1998 | active |
| ZeroPointSix/outlookEmailPlus OutlookMail Plus is a self-hosted email manager purpose-built for account registration and verification workflows. It automates fetching ve… | 76 | 1996 | active |
| EsperoTech/yaade Yaade is an open-source, self-hosted, collaborative API development environment designed as a Postman alternative. It supports REST and Web… | 47 | 1990 | active |
| Atomic Atomic is a self-hosted, local-first personal knowledge base that turns markdown notes into a semantically-connected, AI-augmented knowledg… | 75 | 1988 | 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 |
| 404-novel-project/novel-downloader An extensible userscript (Tampermonkey/Greasemonkey/Violentmonkey) that downloads novels from many Chinese web novel sites and exports them… | 77 | 1980 | active |
| jberg/butterchurn Butterchurn is a WebGL2-based JavaScript library that reimplements the MilkDrop music visualizer in the browser. It renders audio-reactive … | 64 | 1969 | 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 |
| acgotaku/115 115Exporter is a browser extension (Chrome/Firefox) that exports download links from the 115 cloud storage service to aria2 via its JSON-RP… | 77 | 1909 | active |
| karlicoss/promnesia Promnesia is a browser extension plus Python backend that enhances browsing history by annotating visited pages with context from multiple … | 79 | 1908 | active |
| lightspark/lightspark Lightspark is an open source Flash player implementation written in C++ that plays SWF files and supports all versions of ActionScript. It … | 89 | 1907 | 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 |
| markdown-viewer/markdown-viewer-extension A Markdown viewer and exporter available as a browser extension (Chrome, Edge, Firefox) plus Obsidian and VS Code plugins, with a Node.js h… | 82 | 1886 | active |
| giantpinkrobots/varia Varia is a GTK4/libadwaita download manager for Linux, Windows, and macOS that handles regular file downloads, torrents, and video/audio st… | 92 | 1878 | 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 |
| ShunCai/QZoneExport A browser extension (Chrome/Edge/Firefox, Manifest V3) that backs up QQ Zone data—posts, blogs, private diaries, albums, videos, comments, … | 84 | 1863 | 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 |
| mwmbl/mwmbl Mwmbl is an open source, non-profit web search engine with no ads or tracking, where the community determines rankings and runs distributed… | 75 | 1858 | 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 |
| mailvelope/mailvelope Mailvelope is a browser extension for Chrome and Firefox that adds OpenPGP end-to-end email encryption to arbitrary webmail providers. It u… | 85 | 1847 | active |
| nilsteampassnet/TeamPass TeamPass is a free, self-hosted collaborative password manager written in PHP/MySQL, offering folder-level access control, AES-256-GCM auth… | 93 | 1827 | active |
| infi-pc/locatorjs LocatorJS is a browser extension and library that lets developers click on any UI component in the browser to open its source code in their… | 75 | 1825 | active |
| 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 |
| mozilla/fx-private-relay Firefox Relay is a Mozilla service that generates email aliases (masks) which forward messages to your real inbox, hiding your personal add… | 95 | 1802 | 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 |
| 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 |
| 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 |
| 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 |
| simov/markdown-viewer A browser extension that renders Markdown files (local and remote) directly in Chrome, Firefox, Edge, and other Chromium-based browsers. It… | 46 | 1695 | active |
| ankit/stylebot Stylebot is an open-source browser extension for Chrome, Firefox, and Edge that lets users instantly change the appearance of any webpage b… | 99 | 1684 | active |
| reek/anti-adblock-killer Anti-Adblock Killer is a userscript (AakScript) plus an AdBlock-style filter list (AakList) that together prevent websites from detecting a… | 23 | 6214 | maintenance |
| coral-xyz/backpack Backpack is an open-source crypto wallet browser extension built in TypeScript, serving as a home for xNFTs and supporting Solana, Ethereum… | 23 | 1660 | active |
| elementdavv/internet_archive_downloader A Chrome and Firefox browser extension that downloads borrowable books from Internet Archive (archive.org) and full-view books from HathiTr… | 70 | 1651 | active |
| guillevc/yubal yubal is a self-hosted YouTube Music downloader that turns pasted links into a tagged, organized music library with albums, playlists, lyri… | 78 | 1646 | active |
| homerchen19/github-file-icons A browser extension that replaces the default file icons on GitHub, GitLab, Gitea, and Gogs with distinct icons per file type. It supports … | 23 | 1646 | active |
| qsniyg/maxurl Image Max URL is a userscript and browser extension that finds larger or original versions of images and videos by rewriting URL patterns, … | 75 | 1630 | active |
| kkHAIKE/fake115 A Tampermonkey userscript that disguises the browser as the official 115 client to bypass login and download restrictions on the 115 cloud … | 64 | 1625 | active |
| BabylonJS/Spector.js SpectorJS is a JavaScript framework and browser extension for capturing and inspecting WebGL/WebGL2 frames. It lets developers view the ful… | 86 | 1619 | active |
| Online Dictionary Helper Online Dictionary Helper is a Chrome/Firefox browser extension that shows definitions of selected words and phrases from online or built-in… | 76 | 1617 | active |
| sveltejs/svelte-devtools Svelte DevTools is a browser extension for Chrome and Firefox that adds a Svelte inspection tab to browser developer tools. It displays the… | 23 | 1614 | active |
| ffoodd/a11y.css a11y.css is a CSS stylesheet that highlights potential accessibility risks and mistakes in HTML markup by displaying visual warnings direct… | 62 | 1613 | active |
| repplus/rep-chrome rep+ is a Chrome DevTools extension inspired by Burp Suite's Repeater that captures and replays HTTP requests with modified methods, header… | 48 | 1610 | active |
| dessant/web-archives Web Archives is an open-source browser extension for finding archived and cached versions of web pages across multiple search engines like … | 81 | 1602 | active |
| Raindrop.io Source code for Raindrop.io 5.0, a bookmark and web-clipping manager, provided as a monorepo containing the web app, browser extensions, an… | 83 | 1598 | active |
| Ademking/MD-This-Page A browser extension for Chrome and Firefox that converts any webpage into clean, readable Markdown with one click, using Mozilla's Readabil… | 73 | 1598 | active |
| Xatta-Trone/medium-parser-extension A browser extension for Chrome, Edge, and Firefox that lets users read member-only articles on medium.com and Medium-based sites (e.g. Towa… | 56 | 1590 | active |
| webrecorder/archiveweb.page ArchiveWeb.page is a high-fidelity web archiving tool that runs as a Chrome/Chromium browser extension and as a standalone Electron app. It… | 94 | 1587 | active |
| DimensionDev/Maskbook Mask Network is a browser extension that bridges Web2 social media platforms (X, Facebook, Instagram, Minds, Mirror) with Web3 services. It… | 97 | 1586 | active |
| aaronjanse/dns-over-wikipedia A browser extension (with an optional Rust redirect script) that redirects domains ending in `.idk` by looking up the site's Wikipedia arti… | 50 | 1577 | active |
| SwingTheVine/Wplace-BlueMarble Blue Marble is a Tampermonkey userscript that overlays template images onto the wplace.live pixel-art canvas, showing users exactly where t… | 70 | 1571 | active |
| willmiao/ComfyUI-Lora-Manager A ComfyUI extension that provides a web-based manager for organizing, previewing, downloading, and applying LoRA models with metadata and r… | 85 | 1543 | active |
| PaperDebugger/paperdebugger PaperDebugger is an AI-powered academic writing assistant delivered as a Chrome extension that integrates directly into Overleaf for in-edi… | 57 | 1542 | active |