Browse free open source JavaScript Browsers and projects below. Use the toggles on the left to filter open source JavaScript Browsers by OS, license, language, programming language, and project status.

  • Cut Data Warehouse Costs by 54% Icon
    Cut Data Warehouse Costs by 54%

    Easily migrate from Snowflake, Redshift, or Databricks with free tools.

    BigQuery delivers 54% lower TCO with exabyte scale and flexible pricing. Free migration tools handle the SQL translation automatically.
    Start Free
  • Ship Agents Faster Icon
    Ship Agents Faster

    Transform your applications and workflows into powerful agentic systems at global scale.

    Gemini Enterprise Agent Platform lets you rapidly build, scale, govern and optimize production-ready agents grounded in your organization's data. The platform enables developers to build custom or pre-built agents for virtually any use case. New customers get $300 in free credits.
    Start Free
  • 1
    Logic Circuit Diagram

    Logic Circuit Diagram

    Build now your diagram logic circuit

    A full-client web application, practical and useful developer diagrams for the construction of the logic of a circuit, with circuit simulator, AC, DC and Transient Analysis, for your Computer Desktop. You can to export yours diagrams in pdf, png, jpg, gif and tiff. ========== Support Windows 7 and later with ia-32 or arch x64 ========== Android app: https://play.google.com/store/apps/details?id=com.ulm.droidtronics Chrome extension: http://bit.ly/29Tdvz7 Opera add-on: http://bit.ly/1igCRWQ
    Downloads: 0 This Week
    Last Update:
    See Project
  • 2
    Loki

    Loki

    Visual Regression Testing for Storybook

    There are a few visual regression tools for the web, but most either cannot be run headless or use phantomjs which is deprecated and a browser nobody is actually using. They usually also require you to maintain fixtures. With react-native it's now possible to target multiple platforms with a single code base, but there's no single tool to test all to my knowledge. Loki aims to have easy setup, no to low maintenance cost, reproducible tests independent of which OS they are run on, runnable on CI, and support all platforms storybook does.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3
    Loop Client

    Loop Client

    Download your favorite Movie, TV shows, Musics, Games, Animes for free

    Download your favorite Movie, TV shows, Musics, Games, Animes for free without visiting a website. Unlimited downloads,
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    MD5 Reborned Hasher
    This is a extension for Mozilla Firefox that allows to check the MD2, MD5, SHA1, SHA256, SHA384 or SHA512 sum of a downloaded file.
    3.4 out of 5 stars 5 Reviews
    Downloads: 0 This Week
    Last Update:
    See Project
  • Host LLMs in Production With On-Demand GPUs Icon
    Host LLMs in Production With On-Demand GPUs

    NVIDIA L4 GPUs. 5-second cold starts. Scale to zero when idle.

    Deploy your model, get an endpoint, pay only for compute time. No GPU provisioning or infrastructure management required.
    Start Free
  • 5
    MM3-ProxySwitch - Firefox WebExtension

    MM3-ProxySwitch - Firefox WebExtension

    MM3-ProxySwitch - Firefox & Chrome - Extension (Add-ons)

    In Browser Chrome by Google or Firefox and Thunderbird by Mozilla you can per default configure only the setting for one internet connection. With the MM3- Proxy Switch you can manage different configurations and simply switch over between these.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    this plugin for FCKeditor to play MP3 on your site
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    MPlayer-tru is the solution to provide Truran VOD system network protocol implementation to all the mainstream media players integrated with popular browsers. MPlayer-tru currently supports MPlayer and Xine player integrated in Mozilla Firefox and MSIE.
    5.0 out of 5 stars 1 Review
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    Fast and easy to deploy PHP and AJAX driven file browser with caching support and options to secure folders with passwords. Packing of folders for download, showing picture thumbnails, previewing text files and software information files.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9

    Magnetic

    Browser addon to batch download torrents

    I developed this for my own needs but I don't see why I shouldn't share it! Usage is very easy: * Make sure you have installed an application capable of intercepting magnet: links (see http://en.wikipedia.org/wiki/Comparison_of_BitTorrent_clients#Features_I) * Open at least a magnet link manually and associate a default application to the protocol * Now clicking the addon button will open all magnet links in all open tabs and send them to the torrent client! Let me know if you find any issues, this is my very first mod and is very early in development, it definitely needs more work ;)
    Downloads: 0 This Week
    Last Update:
    See Project
  • Already Paying for an RMM? Get 50% Off Splashtop AEM Icon
    Already Paying for an RMM? Get 50% Off Splashtop AEM

    Switch to Splashtop AEM and save up to 50% in your first year

    Automated OS and third-party patching for Windows and macOS, CVE prioritization with AI patch summaries, and built-in remote control that also supports Linux. Qualifying organizations switching from another RMM get up to 50% off year one.
    Get Started
  • 10
    Make GitHub Great Again!

    Make GitHub Great Again!

    Extension for making GitHub great again

    Get your old GitHub back. Remove the new dark topbar, hide those garish blue links and restore all the original colors! Download this repository. Open up chrome://extensions/ in your browser and click “Developer mode” in the top right. Click on the new button Load unpacked extension and select the downloaded folder. Congratulations! You just made GitHub Great again!
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    Mantra on Chromium

    Mantra on Chromium

    Chromium based portable browser for pentesters

    MoC is a chromium based portable browser with collection of open source extensions meant for penetration testers, web application developers and security professionals etc.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    Markdown Saver

    Markdown Saver

    Save any web page as clean Markdown for Obsidian and notes

    Save any web page, or just the part you select, as clean Markdown. Ready for Obsidian, Joplin, Logseq, a Git repo or any notes app. Markdown Saver finds the article, drops the menus, adverts and sidebars, and gives you Markdown you can check and edit before you save it. A free, open source browser extension for Chrome, Microsoft Edge, Brave, Opera, Vivaldi and Firefox, from TechyGeeksHome. No account, no tracking, nothing to pay. The files here are copied from the GitHub releases. Use the main ZIP for Chrome, Edge, Brave, Opera and Vivaldi (Load unpacked) and the -firefox ZIP for Firefox. Full install guide: https://techygeekshome.info/browser-extensions/markdown-saver/
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    Masonry

    Masonry

    A cascading grid layout plugin

    Masonry is a JavaScript grid layout library. It works by placing elements in optimal position based on available vertical space, sort of like a mason fitting stones in a wall. You’ve probably seen it in use all over the Internet. All sizing and styling of items is handled by your own CSS. tem sizes can be set with percentages for responsive layouts. With the masonry layout mode, set percentage-width columnWidth with element sizing. Set percentPosition: true so item positions are likewise set with percentages to reduce adjustment transitions on window resize. Unloaded images can throw off Masonry layouts and cause item elements to overlap. imagesLoaded resolves this issue. imagesLoaded is a separate script you can download at imagesloaded.desandro.com. Or, initialize Masonry after all images have been loaded.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    Melt UI

    Melt UI

    A set of headless, accessible component builders for Svelte

    Melt UI is an open-source headless component builder library created specifically for the Svelte ecosystem, designed to help developers construct accessible and highly customizable user interface components. Rather than providing fully styled widgets, the library focuses on supplying the behavioral logic and accessibility patterns needed to build UI components while allowing developers to control the visual appearance. Melt UI introduces a builder-based architecture where component logic is encapsulated in reusable primitives that can be attached to any HTML element or custom component. The project strongly emphasizes accessibility and follows WAI-ARIA standards to ensure consistent keyboard navigation and screen reader compatibility. It also integrates seamlessly with SvelteKit and TypeScript, making it suitable for modern web development workflows.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    Memofox is a "Mozilla Firefox" extension that allows clipboard storage on a ftp site. It aims to provide users with an access to their notes, regardless of their current location.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    Mikubify

    Mikubify

    Injects miku into webpages

    Mikubify is a script forked from meowbify and mobify which injects a random image of hatsune miku into any given webpage.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Mirrored Mockup Design

    Mirrored Mockup Design

    Easily design websites on the go. No coding necessary!

    There's many great tools out there for web design like Adobe Edge Animate, Google Web Designer, and Adobe Proto (Except discontinued for android), but these tools are only good for those users who are running Windows, Mac OS X, or the iOS platforms. I however couldn't find a decent website designer for Linux or Android so I decided to make my own as a fun experiment.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Modern Browser Homepage

    Modern Browser Homepage

    A customizable "new tab" page for Firefox.

    A customizable and modern "new tab" page for Firefox. Have you ever wanted to use your own background image in your Firefox homepage? This extension allows you to do that, while keeping the easy access to your bookmarks and a sleek look.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Molybdenum is an IDE for creating, editing, running and recording testscripts for Selenium, a browser integrated testtool from http://thoughtworks.com. Molybdenum is build as a Mozilla Firefox extension/application.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    Morten's JavaScript Tree Menu is a Windows Explorer(tm)-like hierarchial menu system for websites using Ecma/JavaScript.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    MozLinker is a plug-in for mozilla which imports a remote RDF file which contains links into toolbar and menu. The supported RDF file is in RSS 1.0 format with hierarchical structure enhancement. It could be used as news feeder or dynamic menu in Mozilla.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    The HisTree extension for Mozilla Firebird improves upon the traditional linear browsing paradigm by presenting a new sidebar with a tree-oriented representation of the user\'s browsing history.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    Mozilla Pichiciego
    Un pequeño navegador de internet basado en Mozilla || Very Lightweight web browser powered with Mozilla
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    Multi-Account Containers

    Multi-Account Containers

    Keep parts of your online life separated into color-coded tabs

    Firefox Multi-Account Containers lets you keep parts of your online life separated into color-coded tabs. Cookies are separated by container, allowing you to use the web with multiple accounts and integrate Mozilla VPN for an extra layer of privacy. Under the hood, it separates website storage into tab-specific Containers. Cookies downloaded by one Container are not available to other Containers. You can even integrate individual Containers with Mozilla VPN to protect your browsing and location. With the Firefox Multi-Account Containers extension, you can sign in to two different accounts on the same site (for example, you could sign in to work email and home email in two different Container tabs. Keep different kinds of browsing far away from each other (for example, you might use one Container tab for managing your Checking Account and a different Container tab for searching for new songs by your favorite band)
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    MultiOpen Bookmarklet is a JavaScript bookmarklet which allows cross-browser opening of a list of URLs in separate tabs or windows, without the overhead of a browser extension
    Downloads: 0 This Week
    Last Update:
    See Project