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.

  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

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  • 1
    JSPackaging is a JavaScript framework that provides simple directives for defining, loading & importing uniquely named packages of JavaScript modules. UPDATE: This project now exists as Ajile at http://sf.net/projects/ajile & http://ajile.iskitz.com.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 2
    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.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 3
    Powerful multimedia plugin for Firefox based on ffmpeg.
    Downloads: 3 This Week
    Last Update:
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  • 4
    pinvault-pro-extension

    pinvault-pro-extension

    AI-powered browser extension for bulk downloading Pinterest images wit

    PinVault Pro is a professional-grade browser extension that revolutionizes Pinterest image downloading with AI-powered technology. The extension provides intelligent bulk selection, auto-scroll functionality, and maintains HD quality downloads while respecting Pinterest's terms of service. 🎯 Core Features: • Visual checkbox overlays on Pinterest images for intuitive selection • AI-powered auto-scroll with smart content detection • Bulk download capabilities with real-time progress tracking • HD quality preservation in original resolution • Modern glassmorphism interface design • Privacy-focused architecture with no external servers • Cross-browser compatibility (Firefox, Chrome, Edge, Opera) • Real-time synchronization between popup and sidebar interfaces 🌍 Universal Browser Support: • Firefox: Official Mozilla Add-ons Store approval (61.4 KB package) • Chrome/Edge: Manifest V3 compatible (60.0 KB package) • Opera: Manifest V3 compatible (60.3 KB package)
    Downloads: 3 This Week
    Last Update:
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  • 5

    seaart-save-metadata

    Chrome extention to save metadata of works on seart.ai in XMP in files

    (modified 2025-12-20) v1.1.0 Now it also works on `postDetail` pages. Chrome extention to save metadata of works on seart.ai in XMP and embed them into files. Works on /explore/detail pages and /postDetail/ pages. Does NOT work to videos. Filenames are automatically sanitized. It saves: prompt, model, checkpoint, lora, creator, source, etc. of each work. Press a button to start fetching metadata and download a work on a target page. # Installation Unpack the release and directly load it into Chrome with "Load unpacked".
    Downloads: 3 This Week
    Last Update:
    See Project
  • 6
    Inspector Tool

    Inspector Tool

    Firebug Lite Beta for Google Chrome and Opera Browser

    Tool for web developer dedicated to Chrome and Opera browser based on Firebug Lite (Beta release). It is free and open source plugin available on SourceForge. Main features: - Same look and feel as Firebug - Inspect HTML and modify style in real-time - JavaScript Console with autocomplete code (tab, shift+tab) - Rich representation of DOM elements - Live editing CSS rules and properties - Elements are selected on-the-fly while using the Inspect tool again activatable in context menu ======= Using it in this Chrome extension: http://bit.ly/1NiErH5
    Downloads: 5 This Week
    Last Update:
    See Project
  • 7
    Adam's Code
    This is a site that I use to keep programs I make and want to share.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 8
    CatBlock

    CatBlock

    The continued maintenance of Michael Gundlach's CatBlock

    After the creator of AdBlock, Michael Gundlach, retired official support of the CatBlock project, and made it Open-Source under the GNU GPLv3, two people decided to continue maintenance, albeit unofficially. This is that project.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 9
    JS Injector

    JS Injector

    Inject JavaScript custom code into every webpage

    ### This WebExtension is developed for web-developers to easily inject any javascript code into any webpage or website (e.g. to help with debugging). You can write any creative thing you can think of. Send me your suggestions and support the development of this add-on ... Thanks in advance ! === Get your ES6 Editor on Play Store > https://play.google.com/store/apps/details?id=com.ulm.esix
    Downloads: 4 This Week
    Last Update:
    See Project
  • AI-generated apps that pass security review Icon
    AI-generated apps that pass security review

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    Retool lets you generate dashboards, admin panels, and workflows directly on your data. Type something like “Build me a revenue dashboard on my Stripe data” and get a working app with security, permissions, and compliance built in from day one. Whether on our cloud or self-hosted, create the internal software your team needs without compromising enterprise standards or control.
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  • 10

    Local Browser

    A portable Web Browser with access to the Operating System.

    Local Browser is a web browser based on webkit for easily building portable desktop applications using javascript. It is build on QT framework and it give access to the Operating System like executing a program, access to the file system and sqlite. It works on windows and linux.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 11
    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: 4 This Week
    Last Update:
    See Project
  • 12
    The objective of the OpenBerg Project is to develop Open-Source, Open-Standards-based, Multi-Platform tools for eBook authors, editors and users. We are currently working on OpenBerg Lector, an e-Book reader, and OpenBerg Rector, an e-Book compiler.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 13

    Simple Translate

    A powerful tool to translate selected words (or sentences) to a wide r

    Some useful notes: [1] Before using the extension, please make sure to visit the options page to adjust your settings. [2] To access the options page, right click the extension icon and select options. [3] All changes in the options page are auto saved. [4] To activate the extension after installation, please reload all your existing pages. [5] Please consider supporting this app by making a small donation :)
    Downloads: 4 This Week
    Last Update:
    See Project
  • 14
    Standard-Sitemap Project
    The Standard-Sitemap Navigator is a Firefox extension to help navigate websites. The webmaster of a site can provide a navigational sitemap in XML, and this extension fetches it and displays it as you visit.
    Downloads: 4 This Week
    Last Update:
    See Project
  • 15
    SuperOgame
    Enjoy your game of OGame with Opera and SuperOgame!
    Downloads: 4 This Week
    Last Update:
    See Project
  • 16
    XPDOM (Cross-Platform DOM) is a W3C-DOM Level 2 compatibility layer to programming Dynamic HTML in standard DOM and exactly same way in most popular browsers with DHTML: MSIE 4+ and Netscape 6+/Mozilla/Firefox as reference implementation
    Downloads: 4 This Week
    Last Update:
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  • 17
    dAsync is a JavaScript OOP library attempting to keep Ajax development simple, while giving the developer maximum control.
    Downloads: 4 This Week
    Last Update:
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  • 18
    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.
    Downloads: 2 This Week
    Last Update:
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  • 19
    Another YouTube Downloader
    Cross browser userscript to download videos from YouTube in various formats and sizes available. Find size of videos before downloading (http://pradip.x10.mx/index.php/download-details/36/Helper) Check Readme.txt in Files section for installation instructions.
    Downloads: 2 This Week
    Last Update:
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  • 20
    XML Viewer Plus

    XML Viewer Plus

    A powerful XML Viewer - add-on for browser Firefox

    A powerful XML Viewer, supports text/regex and jQuery/CSS, XPath selectors ==== Release 1.2.6 - 17.06.2019 - Added utf-8 encode for xml viewer ==== Get your XML Editor and Validator on Play Store > https://play.google.com/store/apps/details?id=com.ulm.xmleditor ==== ## Libraries and techs used 1. `Vue` 2. `Vuex` 3. `lodash/debounce` 4. `jQuery` 5. `document.querySelectorAll` 6. `document.evaluate` for `XPath` 7. `bestzip` for packaging ### Limitations - WebExtension only works on sites that allow content scripts.
    Downloads: 2 This Week
    Last Update:
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  • 21
    extensions, tools, utilities and plugins for the K-Meleon browser
    Leader badge
    Downloads: 2 This Week
    Last Update:
    See Project
  • 22
    Browserver is a project that allow you freely change your location without change your navigation. It is a firefox add-on.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 23
    This Firefox extension lets users to see prices of Ikea products on their local Ikea webpage from other countries and compare them.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 24
    Custom Form Elements unites all efforts in the web to enhance web-based XHTML forms in terms of style, usability and accessibility by using Javascript and/or CSS. Custom Form Elements work cross-browser, currently supporting most A-grade browsers.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 25
    Greasemonkey
    Remote repository and documentation for user.js engine
    Downloads: 3 This Week
    Last Update:
    See Project