* [MetaMask Browser Extension v13.33.0](https://github.com/MetaMask/metamask-extension) – Browser extension for interacting with Ethereum blockchain enabled websites.

* [Playwright v1.60.0](https://github.com/microsoft/playwright) – Framework for web testing and automation across multiple browsers with a single API.

* [uBlock Origin (uBO) 1.71.0](https://github.com/gorhill/uBlock) – CPU and memory-efficient content blocker for Chromium and Firefox that blocks ads, trackers, and other unwanted content.

* [Copy as Markdown v3.7.0](https://github.com/yorkxin/copy-as-markdown) – Browser extension that copies selections, links, images, or lists of tabs to the clipboard as Markdown.

* [Browserless v2.50.0](https://github.com/browserless/browserless) – Remote execution of headless browsers in Docker with support for Puppeteer and Playwright.

* [Natsumi Browser v6.6.0](https://github.com/greeeen-dev/natsumi-browser) – A skin for Zen Browser that enhances the design with animations and a polished look.

* [Browsertime v27.4.0](https://github.com/sitespeedio/browsertime) – Powerful Node.js tool for measuring and optimizing web performance.

* [OdooTerminal v12.0.0](https://github.com/Tardo/OdooTerminal) – Browser extension providing a terminal-like interface to control Odoo via JSON-RPC across versions 11-19.

* [Osprey 2.0.0](https://github.com/OspreyProject/Osprey) – Browser extension protecting users from malicious websites, phishing, malware, and scams.

* [Adaptive Tab Bar Colour v4.0](https://github.com/easonwong-de/Adaptive-Tab-Bar-Colour) – Firefox add-on that changes the theme color to match the website's appearance.

* [detectIncognito.js v1.7.0](https://github.com/Joe12387/detectIncognito) – JavaScript library for detecting incognito and private browsing modes in various modern browsers.

* [SyncNos v1.8.0](https://github.com/SyncNos/SyncNos-Webclipper) – Web clipper that saves AI chats, web articles, and video transcripts to Notion, Obsidian, and Feishu.

* [Easy Speed Dial v2.14.0](https://github.com/lucaseverett/easy-speed-dial) – Browser extension replacing the new tab page with a customizable, colorful grid of bookmarks and folders.

* [cat-catch 2.6.9](https://github.com/xifangczy/cat-catch) – Browser extension for resource sniffing in web applications.

* [Progressive Web Apps for Firefox v2.18.3](https://github.com/filips123/PWAsForFirefox) – Installs, manages, and runs Progressive Web Apps in Firefox via a modified runtime, command-line tool, and browser extension.

* [Zen Browser 1.20.1b](https://github.com/zen-browser/desktop) – Privacy-focused browser that blocks trackers and ads for a better browsing experience.

* [Second Sidebar for Firefox v2.0.1](https://github.com/aminought/firefox-second-sidebar) – Firefox userChrome.js script adding a customizable second sidebar with web panels and advanced features.

* [Sine v2.3.3](https://github.com/CosmoCreeper/Sine) – Community-driven mod and theme manager for Firefox-based browsers with a built-in marketplace and easy mod publishing.

* [Chameleon v0.22.84](https://github.com/sereneblue/chameleon) – WebExtension port of Random Agent Spoofer providing user-agent and fingerprint spoofing, header and privacy controls.

* [Firefox Mod Blur v2.50](https://github.com/datguypiko/Firefox-Mod-Blur) – Modular Firefox CSS theme with support for light and dark modes and compact design.

* [WaveFox v1.9.151](https://github.com/QNetITQ/WaveFox) – Firefox theme for manual customization with various visual options.

* [Opera-GX Theme for Firefox Css v.11.6](https://github.com/Godiesc/firefox-gx) – Theme for users who love the Opera GX skin, ensuring full compatibility with the stable version of Firefox.

* [RYS Remove YouTube Suggestions v4.3.81](https://github.com/lawrencehook/remove-youtube-suggestions) – Browser extension to hide recommendations, customize YouTube's interface, and reduce algorithmic distractions.

* [SAML-tracer samltracer-1.9.3](https://github.com/simplesamlphp/SAML-tracer) – Browser extension that logs web requests and highlights and decodes SAML and WS-Federation messages.

* [Streaming enhanced v.1.1.98](https://github.com/Dreamlinerm/Netflix-Prime-Auto-Skip) – Automatically skip ads, intros, recaps and credits across major streaming services.

* [Cookie auto decline 7.4](https://github.com/JobcenterTycoon/cookie-auto-decline) – Browser extension that automatically declines cookie consent banners by clicking decline or setting required cookies in the background.

* [Quantum Nox Firefox Customizations FF152](https://github.com/Izheil/Quantum-Nox-Firefox-Customizations) – Firefox tweaks providing multi-row tabs, context menu and UI customizations via userChrome/CSS and JS installers.

* [Phyrox portable 150.0.2-69](https://github.com/portapps/phyrox-portable) – Firefox-based portable web browser packaged for Windows via Portapps.

* [Phoenix 2026.05.21.2](https://github.com/celenityy/Phoenix) – Suite of configurations and advanced modifications for Mozilla Firefox that prioritize privacy, security, freedom, functionality, and usability.