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.

  • Demo Series - Small Business Backup By Veeam Icon
    Demo Series - Small Business Backup By Veeam

    Learn how to protect your Microsoft 365 data, with simple, actionable tips today.

    Watch this on-demand demo series and learn how to protect your Microsoft 365 data with clear, simple, actionable steps that are easy to implement for businesses of all sizes.
    Watch Demo Series
  • Build Securely on AWS with Proven Frameworks Icon
    Build Securely on AWS with Proven Frameworks

    Lay a foundation for success with Tested Reference Architectures developed by Fortinet’s experts. Learn more in this white paper.

    Moving to the cloud brings new challenges. How can you manage a larger attack surface while ensuring great network performance? Turn to Fortinet’s Tested Reference Architectures, blueprints for designing and securing cloud environments built by cybersecurity experts. Learn more and explore use cases in this white paper.
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  • 1
    PrototypePlus is an extension to Prototype Javascript library, which supports subscribe/publish and custom event, AOP, cool widgets and some utils. Visit our website (http://prototypeplus.sourceforge.net/) for the detail.
    Downloads: 0 This Week
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  • 2
    qtl is a FireFox extension for inline translating text.
    Downloads: 0 This Week
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  • 3

    RDFa Developer

    RDFa Developer project has been moved to BitBucket

    Firefox add-on that displays and checks RDFa. RDFa Developer project has been moved to BitBucket https://bitbucket.org/fundacionctic/rdfadev
    Downloads: 0 This Week
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  • 4
    RESTBolt

    RESTBolt

    Browser WebExtension to work on http(s) requests

    ## Inspired by POSTMAN browser extension Add-on is based on [RESTMan](https://github.com/jsargiot/restman) Opera extension --- #### Note - Use a simple HTTP Request & Response Service to test WebExtension
    Downloads: 0 This Week
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  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

    Deploy in 115+ regions with the modern database for every enterprise.

    MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
    Start Free
  • 5
    RJAX (Reverse aJAX) lets the web server push data to the browser. RJAX maintains an open connection between the browser and the server using an applet in the client page. The server can execute javascript commands directly on the client.
    Downloads: 0 This Week
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  • 6
    React Hot Loader

    React Hot Loader

    Tweak React components in real time

    React Hot Loader is a plugin that allows React components to be live reloaded without the loss of state. It works with Webpack and other bundlers that support both Hot Module Replacement (HMR) and Babel plugins. HMR allows us to replace modules in-place without restarting the server. Here’s how you can enable it for different bundlers. The easiest and fastest option to use React Hot Loader with Webpack is to use webpack-dev-server with --hot CLI option. If you’re only rendering on the client side but you have to use some custom node server, this is still an easy option. You can simply copy server.js from the official boilerplate into your project. The important part of the configuration is that when you create a new WebpackDevServer, you need to specify hot: true as an option.
    Downloads: 0 This Week
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  • 7
    React Performance Devtool

    React Performance Devtool

    A browser developer tool extension to inspect performance

    React Performance Devtool is a browser extension for inspecting the performance of React Components. It statistically examines the performance of React components based on the measures which are collected by React using window.performance API. Along with the browser extension, the measures can also be inspected in a console. A demo of the extension being used to examine the performance of React components on my website. Performance measures can also be logged to a console. With every re-render, measures are updated and logged to the console. To use this devtool extension, you'll need to register an observer in your app which will observe a collection of data (performance measures) over time. Registering an observer hooks an object containing information about the events and performance measures of React components to the window object, which can then be accessed inside the inspected window using eval().
    Downloads: 0 This Week
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  • 8
    React Refresh Webpack Plugin

    React Refresh Webpack Plugin

    A Webpack plugin to enable "Fast Refresh"

    An EXPERIMENTAL Webpack plugin to enable "Fast Refresh" (also known as Hot Reloading) for React components. This plugin is not 100% stable. We're hoping to land a v1 release soon, please help us by reporting any issues you've encountered! Ensure that you are using at least the minimum supported versions of this plugin's peer dependencies - older versions, unfortunately, do not contain code to orchestrate "Fast Refresh", and thus cannot be made compatible. For most setups, we recommend integrating using babel-loader. It covers the most use cases and is officially supported by the React team. If you haven't done so, set up your development Webpack configuration for Hot Module Replacement (HMR). This plugin integrates with the most common Webpack HMR solutions to surface errors during development, in the form of an error overlay.
    Downloads: 0 This Week
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  • 9
    Reactive Extensions for JavaScript

    Reactive Extensions for JavaScript

    An API for asynchronous programming with observable streams

    An API for asynchronous programming with observable streams. The Observer pattern done right. ReactiveX is a combination of the best ideas from. The Observer pattern, the Iterator pattern, and functional programming. ReactiveX is everywhere, and it's meant for everything. Available for idiomatic Java, Scala, C#, C++, Clojure, JavaScript, Python, Groovy, JRuby, and others. Embrace ReactiveX's asynchronicity, enabling concurrency and implementation independence. Manipulate UI events and API responses, on the Web with RxJS, or on mobile with Rx.NET and RxJava. Avoid intricate stateful programs, using clean input/output functions over observable streams. ReactiveX's operators often reduce what was once an elaborate challenge into a few lines of code. Traditional try/catch is powerless for errors in asynchronous computations, but ReactiveX is equipped with proper mechanisms for handling errors.
    Downloads: 0 This Week
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  • Build Securely on Azure with Proven Frameworks Icon
    Build Securely on Azure with Proven Frameworks

    Lay a foundation for success with Tested Reference Architectures developed by Fortinet’s experts. Learn more in this white paper.

    Moving to the cloud brings new challenges. How can you manage a larger attack surface while ensuring great network performance? Turn to Fortinet’s Tested Reference Architectures, blueprints for designing and securing cloud environments built by cybersecurity experts. Learn more and explore use cases in this white paper.
    Download Now
  • 10
    The Recognizer is a web browser addon that detects and flags plagarized comments on Internet sites and highlights it as such for the user, including a link to the search that triggered the warning.
    Downloads: 0 This Week
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  • 11
    Relative XPath Assistant

    Relative XPath Assistant

    Just right click on the html elements to compare them

    This WebExtension will give you the relative XPath expression of two web elements Release 1.4.2 (04/08/2022) - Adding control key functionality Add-on is based on relative-xpath-helper open-source project on github [https://github.com/syamsasi99/relative-xpath-helper] ### Details - Compared to the original version, some incompatibilities of the scripts with the Firefox browser have been improved and fixed - No data is sent to any server and not get from any server ### Limitations - WebExtension only works on sites that allow content scripts. - Add-on does not search through view-source code of webpage.
    Downloads: 0 This Week
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  • 12

    RemoveGooglePlusStuff

    Hide all Google+ stuff like the Google+ bar and the +You button.

    This Chrome/Chromium extension removes Google+ stuff like the Google+ bar in Google home page and the +You button in the same page.
    Downloads: 0 This Week
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  • 13

    ReorJS

    Distributed Computing with JavaScript

    Create your own distributed computer that can distributed javascript based applications to any computer with a web browser, headless browser or node.js installation. For more information and updates please see our website - http://reorjs.com.
    Downloads: 0 This Week
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  • 14
    Reverse Image Search Anywhere

    Reverse Image Search Anywhere

    4-engine reverse image search that works on Instagram & Pinterest

    Reverse image search the way it should work: one right-click, every engine, even where the usual trick fails. Most "search by image" tools break on Instagram, Pinterest, and images drawn to a canvas or served as blob:/data: URLs, and make you check each engine one at a time. This extension fixes both. Right-click any image to search Google Lens, Yandex, Bing Visual and TinEye at once, or pick a single engine. You can also paste an image (Ctrl/Cmd+V), drag to capture a region of the page, or crop and run a dedicated "Search this face" flow. Private by default: ordinary searches go straight from your browser to the engine and never touch our servers. Where a site hides the image URL, the extension uploads that one image to mint a temporary link; it auto-deletes within about an hour and is never sold or used for training. No account, no tracking, no telemetry. MIT licensed. Manifest V3, built with WXT and TypeScript. Chrome and Firefox.
    Downloads: 0 This Week
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  • 15
    The project is a port of the Mozilla Rhino JavaScript Interpreter (http://www.mozilla.org/rhino/) from Java/SE to J2ME/CLDC. The J2ME/CLDC port opens up the mobile world for scripting Java, as it is a widely used platform for mobile phone programming.
    Downloads: 0 This Week
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  • 16

    RightClickMenu

    Right click menu jQuery plugin

    Attach a right-click menu to any DOM object using this jQuery plugin.
    Downloads: 0 This Week
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  • 17
    The Rooster Teeth Site Extender is a Firefox Extension for the RT family of web sites. It provides additional functionality such as an advanced editor for posting, auto sign-in, and more.
    Downloads: 0 This Week
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  • 18
    Instant Image Rotation can now be done on Firefox. RotateFox library is a pure Javascript library that implements all necessary Linear Algebra functions that are required for image rotation. RotateFox has done all mathematical jobs, no math knowledge is
    Downloads: 0 This Week
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  • 19
    A Firefox based browser plugin to add SAREST annotations. See http://www.w3.org/Submission/SA-REST/
    Downloads: 0 This Week
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  • 20
    Online booking system for trainings.
    Downloads: 0 This Week
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  • 21
    SMART markItUp

    SMART markItUp

    completa el editor de posts y temas en Taringa! (Release 10/01/2019)

    Agrega los menus y opciones faltantes al editor de posts/temas en Taringa!. NOTA: La extension no es "perfectamente" funcional, se recomienda editar un post (o tema) en la vista avanzada y nunca simple.
    Downloads: 0 This Week
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  • 22
    SQLite Editor & Compiler

    SQLite Editor & Compiler

    SQLite Editor and Compiler for PC, macOS and Linux

    A valuable SQLite editor for your PC, Mac OS and Linux with a useful button to compile the code sql for immediate preview of tables, columns and values. == OS requirements to this installation == - macOS 10.9 and later are supported, older operating systems are not supported (and do not work). - Windows 7 and later are supported, older operating systems are not supported (and do not work). Both x86 and amd64 (x64) binaries are provided for Windows. Please note, the ARM version of Windows is not supported for now. - Ubuntu 12.04 and later and again Fedora 21 and Debian 8 are supported Both ia32 and x64 binaries are provided for Linux ==================== Get your Android App - https://play.google.com/store/apps/details?id=com.ulm.sqleditordroid ==================== == Browser Extensions == Chrome extension: http://bit.ly/1O4g1u0 == Windows app: http://amzn.to/2uor6ao ==
    Downloads: 0 This Week
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  • 23
    SWFAddress is a small, but powerful library that provides deep linking for Flash and Ajax. It's a developer tool, allowing creation of unique virtual URLs that can point to a website section or an application state.
    Downloads: 0 This Week
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  • 24
    Sagleft's Elemental Browser

    Sagleft's Elemental Browser

    Compact, convenient internet browser.

    Convenient, fast and compact browser. Original design and speed. Relevant for owners of laptops and netbooks, as it is very compact and mobile viewer for internet sites.
    Downloads: 0 This Week
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  • 25
    Sarissa is a cross-browser ECMAScript lib that helps with browser incompatibilities in XMLHttpRequest/XML/XSLT/XPath along with some bonus utility methods. People call some of this Ajax nowdays, but the term was not available back in early 2003 ;-)
    Downloads: 0 This Week
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