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.

  • Build Agents and Models on One Platform Icon
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  • 1
    chromium-web-store

    chromium-web-store

    Allows adding extensions from chrome web store on ungoogled-chromium

    Allows adding extensions from chrome web store on ungoogled-chromium. Also adds semi-automatic extension updating. This extension brings the following functionality to ungoogled-chromium (and other forks that lack web store support). Allows installing extensions directly from chrome web store. Automatically checks for updates to your installed extensions and displays them on the badge. Pin the Chromium Web Store badge in your browser's toolbar. (Badges are hidden by default). The badge will show a red number indicating available updates. Click on the badge, then click the name of any extension to install the latest version. This method will work for non-webstore extensions as well if they support it, including chromium web store itself. (See the section below if you are an extension developer and don't have your extension listed in the chrome web store.)
    Downloads: 9 This Week
    Last Update:
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  • 2
    FreeWRL VRML/X3D browser
    FreeWRL is an Open Source, cross platform VRML2 and X3D compliant browser, with script, SAI and EAI support. Platforms supported: Linux and other Unix-style platforms; Mac OS/X; Windows. Support for mobile platforms (iOS, Android, QNX) is under development.
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    Downloads: 53 This Week
    Last Update:
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  • 3
    Progressive Web Apps for Firefox

    Progressive Web Apps for Firefox

    A tool to install, manage and use Progressive Web Apps (PWAs)

    A tool to install, manage and use Progressive Web Apps (PWAs) in Mozilla Firefox. Progressive Web Apps (PWAs) are web apps that use web APIs and features along with a progressive enhancement strategy to bring a native app-like user experience to cross-platform web applications. Although Firefox supports many of Progressive Web App APIs, it does not support functionality to install them as a standalone system app with an app-like experience. This project creates a custom-modified Firefox runtime to allow websites to be installed as standalone apps and provides a console tool and browser extension to install, manage and use them. Command-line tool to install, manage and run Progressive Web Apps in Firefox. Extension to set up native programs, and install, manage and run PWAs and their profiles directly from the main Firefox browser. Isolated Firefox installation and profile(s) that stores the PWAs.
    Downloads: 8 This Week
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  • 4
    uBlock

    uBlock

    uBlock: a fast, lightweight, and lean blocker for Chrome, Firefox

    uBlock: a fast, lightweight, and lean blocker for Chrome, Firefox, and Safari. Available on the Chrome Web Store or for manual installation. Available to install from the homepage. Available for install from the homepage or from the App Store. Available on the Firefox Add-ons site, or for manual installation. Opera shares Chrome's underlying engine, so you can install uBlock simply by grabbing the latest release for Chrome.To benefit from uBlock's higher efficiency, it's advised that you don't use other blockers at the same time (such as AdBlock or Adblock Plus). uBlock will do as well or better than most popular ad blockers. It's important to note that blocking ads is not theft. Don't fall for this creepy idea. The ultimate logical consequence of blocking = theft is the criminalisation of the inalienable right to privacy.
    Downloads: 8 This Week
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  • 99.99% Uptime for MySQL and PostgreSQL Databases Icon
    99.99% Uptime for MySQL and PostgreSQL Databases

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  • 5
    Eruda

    Eruda

    Console for mobile browsers

    With Eruda you can display JavaScript logs, check dom state, show requests status, show localStorage, cookie information, show url, user agent info, include snippets used most often, Html, js, css source viewer, and install. The JavaScript file size is quite huge(about 100kb gzipped) and therefore not suitable to include in mobile pages. It's recommended to make sure eruda is loaded only when eruda is set to true. When initialization, a configuration object can be passed in. Container element, if not set, it will append an element directly under html root element. Choose which default tools you want, by default all will be added. There are several available plugins, like eruda-fps, which displays page fps info, eruda-features, which will let you see feature detections, eruda-timing, to show performance and resource timing, eruda-memory, to display page memory info, eruda-code, to run JavaScript code, and many more.
    Downloads: 7 This Week
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  • 6
    Ghostery

    Ghostery

    Ghostery Browser Extension for Firefox, Chrome, Opera and Edge

    Ghostery helps you browse smarter by giving you control over ads and tracking technologies to speed up page loads, eliminate clutter, and protect your data. This is the unified code repository for the Ghostery browser extensions in Chrome, Firefox, Opera and Edge. Browse the web safer, faster & with less annoying ads. Equipped with award-winning AI anti-tracking technology to browse the websafe and quickly. Ghostery helps you stay informed about what companies are tracking you by listing the trackers on each website you visit. Granular control within the detailed view allows you to block and unblock specific trackers. With one click, always allow or forbid Ghostery to block trackers and protect your personal data on a specific site. Smart-Browsing automatically optimizes page performance as your browse.
    Downloads: 7 This Week
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  • 7
    Google Unlocked

    Google Unlocked

    Google Unlocked browser extension uncensor google search results

    Google Unlocked is an open-source browser extension, which unlocks hidden google search results. The extension scans hidden links that were censored on Google search results due to complaints. The tool scans those complaints and extracts the links from them, puts the links back into Google results, all in a matter of seconds. The extension was taken down by Google from the Chrome store. Please use manual install. Download the latest zip release from Google Unlocked repository releases. Extract the zip file to a permanent path (Chrome will need to load it every time it restarts). Open Chrome and go to chrome://extensions/ and check the box for Developer mode in the top right. Click the Load unpacked extension button and select the unzipped folder for your extension to install it. After installing the extension, every time you Google a keyword, it will transparently scan the hidden URLs and injects them at the bottom of the page.
    Downloads: 6 This Week
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  • 8
    StackEdit

    StackEdit

    In-browser Markdown editor

    Unrivalled writing experience. StackEdit’s Markdown syntax highlighting is unique. The refined text formatting of the editor helps you visualize the final rendering of your files. StackEdit provides very handy formatting buttons and shortcuts, thanks to PageDown, the WYSIWYG-style Markdown editor used by Stack Overflow. Whether you write, you review, you comment… StackEdit's layout provides you with the flexibility you need, without sacrifice. StackEdit’s Scroll Sync feature accurately binds the scrollbars of the editor panel and the preview panel to ensure that you always keep an eye on the output while writing. StackEdit can sync your files with Google Drive, Dropbox and GitHub. It can also publish them as blog posts to Blogger, WordPress and Zendesk. You can choose whether to upload in Markdown format, HTML, or to format the output using the Handlebars template engine.
    Downloads: 6 This Week
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  • 9
    VBot

    VBot

    JSON based visual regression testing library

    A visual regression testing library/tool, aims to quickly automate browser-based tests with minimum development overhead. To test flexibly in different testing scenarios, either testing against web UI wired with backends or just static web pages, VBot exposes API to be used with testing frameworks like mocha or ava, etc. Therefore, the test data variables can be updated according to different conditions, in order to decouple from real backends and avoid false negative results.
    Downloads: 6 This Week
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  • Custom VMs From 1 to 96 vCPUs With 99.95% Uptime Icon
    Custom VMs From 1 to 96 vCPUs With 99.95% Uptime

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  • 10
    ego (lite)

    ego (lite)

    The fastest browser for AI agents to run web automation

    Ego Lite is a macOS browser designed for people and external AI agents to work in parallel. Each agent receives an isolated Space, allowing several browser tasks to run simultaneously without taking over the user's active tabs. Optional Chrome data migration carries over logins, cookies, extensions, and bookmarks so agents can use authenticated sessions with less setup. The ego-browser skill connects tools such as Codex, Claude Code, Cursor, and custom agent CLIs to the browser. Agents interact through JavaScript tools for navigation, snapshots, form entry, clicks, waiting, and captures. Browser data remains on the device, and users can observe, stop, or take control of an agent's Space. Windows and Linux versions are listed as future work rather than currently supported releases.
    Downloads: 6 This Week
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  • 11
    OWASP Mantra - Security Framework

    OWASP Mantra - Security Framework

    Free and Open Source Browser based Security Framework

    OWASP Mantra - Free and Open Source Browser based Security Framework, is a collection of free and open source tools integrated into a web browser, which can become handy for penetration testers, web application developers, security professionals etc.
    Downloads: 24 This Week
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  • 12
    slick

    slick

    The last carousel you'll ever need

    slick is an open source, responsive carousel plugin that offers a great number of breakpoints, CSS3 transitions, touch events and so much more. It creates fully responsive, customizable and mobile-friendly carousels that can work with any html element. Everything you’ll ever need for your carousel, slick can achieve quickly and easily. It features a comprehensive range of settings, events, methods and more so you can build a carousel in exactly the way you want. It supports IE8+ as well as most modern browsers (Chrome, Firefox, Safari). See it in action in demos on http://kenwheeler.github.io/slick/
    Downloads: 5 This Week
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  • 13
    Orphne is a highly specialized web browser, optimized for viewing "adult" content. Features include tagging, rating, and bookmarking sites, an integrated search, and slide shows. Please note that orphne is intended for adults only.
    Downloads: 38 This Week
    Last Update:
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  • 14
    FastClick

    FastClick

    Easy-to-use library to remove click delays on browsers with touch UIs

    FastClick is a simple, easy-to-use library for eliminating the 300ms delay between a physical tap and the firing of a click event on mobile browsers. The aim is to make your application feel less laggy and more responsive while avoiding any interference with your current logic. FastClick is developed by FT Labs, part of the Financial Times. Note: As of late 2015 most mobile browsers - notably Chrome and Safari - no longer have a 300ms touch delay, so fastclick offers no benefit on newer browsers, and risks introducing bugs into your application. Consider carefully whether you really need to use it. The library has been deployed as part of the FT Web App. FastClick doesn't attach any listeners on desktop browsers.
    Downloads: 4 This Week
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  • 15
    Replace Google CDN

    Replace Google CDN

    A Chrome plugin: Replace Google CDN with domestic

    For well-known reasons, just substituting a domain name can continue to use the front-end public library provided by Google. Likewise, referencing these resources via the scripttag will instantly speed up your website access! Many websites, especially foreign websites, use Google's CDN in order to speed up the website. But in China, due to some reasons, the world's fastest CDN has become the world's slowest. So, I wrote this plugin/extension to replace Google's CDN with a domestic one. This plugin/extension can replace the cdn resources with domestic ones.
    Downloads: 4 This Week
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  • 16
    bootstrap-datepicker

    bootstrap-datepicker

    A datepicker for twitter bootstrap

    Bootstrap-datepicker provides a flexible datepicker widget in the Bootstrap style. Versions are incremented according to semver. As with bootstrap’s own plugins, datepicker provides a data-api that can be used to instantiate datepickers without the need for custom javascript. You can disable datepicker’s data-api in the same way as you would disable other bootstrap plugins. Most options can be provided via data-attributes. An option can be converted to a data-attribute by taking its name, replacing each uppercase letter with its lowercase equivalent preceded by a dash, and prepending “data-date-” to the result. Methods are called on a datepicker by calling the datepicker function with a string first argument, followed by any arguments the method takes.
    Downloads: 4 This Week
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  • 17
    BeEF

    BeEF

    The browser exploitation framework project

    BeEF is short for The Browser Exploitation Framework. It is a penetration testing tool that focuses on the web browser. Amid growing concerns about web-borne attacks against clients, including mobile clients, BeEF allows the professional penetration tester to assess the actual security posture of a target environment by using client-side attack vectors. Unlike other security frameworks, BeEF looks past the hardened network perimeter and client system, and examines exploitability within the context of the one open door: the web browser. BeEF will hook one or more web browsers and use them as beachheads for launching directed command modules and further attacks against the system from within the browser context.
    Downloads: 3 This Week
    Last Update:
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  • 18
    Bowser

    Bowser

    Bowser is a browser detector

    A small, fast and rich-API browser/platform/engine detector for both browser and node. The library is made to help to detect what browser your user has and gives you a convenient API to filter the users somehow depending on their browsers. Version 2.0 has drastically changed the API. All available methods are on the docs page. Often we need to pick users' browser properties such as the name, the version, the rendering engine and so on. You could want to filter some particular browsers to provide any special support for them or make any workarounds. Settings for any particular OS or platform has more priority and redefines settings of standalone browsers. Thus, you can define OS or platform-specific rules and they will have more priority in the end. More of API and possibilities you will find in the docs folder.
    Downloads: 3 This Week
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  • 19
    CanvasBlocker

    CanvasBlocker

    A Firefox extension to protect from being fingerprinted

    This add-on allows users to prevent websites from using some Javascript APIs to fingerprint them. Users can choose to block the APIs entirely on some or all websites (which may break some websites) or just block or fake its fingerprinting-friendly readout API. Canvas Blocker's default setting, and my favorite! All websites not on the white list or black list can use the protected APIs. But values obtained by the APIs are altered so that consistent fingerprinting is not possible. If a website is not listed on the white list or black list, the user will be asked if the website should be allowed to use the protected APIs each time they are called. Block the protected APIs only for websites on the black list. Ignore all lists and allow the protected APIs on all websites.
    Downloads: 3 This Week
    Last Update:
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  • 20
    DuckDuckGo Android App

    DuckDuckGo Android App

    Privacy browser for Android

    DuckDuckGo is an app that gives you utmost privacy when browsing online. It stops you from getting tracked and protects your personal and private information, no matter where the internet may take you. Apart from providing standard browsing functionality, DuckDuckGo blocks all hidden third-party trackers, forces sites to use an encrypted connection where available, and provides a Privacy Grade rating for each website you visit.
    Downloads: 3 This Week
    Last Update:
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  • 21
    Floccus

    Floccus

    Sync your bookmarks privately across browsers and devices

    Browser Extensions & Android App that sync your bookmarks across all your browsers and devices. Via an optionally selfhosted Nextcloud or WebDAV server or optionally end-to-end encrypted via Google Drive. Use any browser that supports Web extensions (e.g. Firefox, Chrome, Edge, Opera, Brave, Vivaldi, ...; Safari not yet) Install the floccus Android app to access your bookmarks on your phone. Create as many sync profiles as you need. Control sync strategy (i.e. uni- or bidirectional), sync interval and synced folder. Easily export your configuration. Keep your credentials secure with an encryption passphrase. Sync your bookmarks privately across browsers an devices.
    Downloads: 3 This Week
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  • 22
    JavaScript Cookie

    JavaScript Cookie

    A simple, lightweight JavaScript API for handling browser cookies

    A simple, lightweight JavaScript API for handling cookies which works in all browsers and accepts any character. It is heavily tested, has no dependency, supports ES modules and supports AMD/CommonJS. It is RFC 6265 compliant, has an useful Wiki, and enables custom encoding/decoding. More than 800 bytes gzipped! This project is RFC 6265 compliant. All special characters that are not allowed in the cookie-name or cookie-value are encoded with each one's UTF-8 Hex equivalent using percent-encoding. The only character in cookie-name or cookie-value that is allowed and still encoded is the percent % character, it is escaped in order to interpret percent input as literal. Please note that the default encoding/decoding strategy is meant to be interoperable only between cookies that are read/written by js-cookie. To override the default encoding/decoding strategy you need to use a converter.
    Downloads: 3 This Week
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  • 23
    Librefox

    Librefox

    Firefox with privacy enhancements

    This project aims at enforcing the privacy and security of Firefox without forking the project. Librefox uses more than 500 privacy/security/performance settings, patches, Librefox-Addons (optional) and a cleaned bundle of Firefox (updater, crashreporter and Firefox's integrated addons that don't respect privacy are removed). Updated browser: because this project is not a fork, it is kept updated with the latest Firefox version. Limit internet access for extensions (firewall-test-feature). IJWY (I Just Want You To Shut Up): embedded server links and other calling home functions are removed (zero unauthorized connection by default). Settings protection: important settings are enforced/locked within mozilla.cfg and policies.json, those settings cannot be changed by addons/updates/Firefox or unwanted/accidental manipulation; To change those settings you can easily do it by editing mozilla.cfg and policies.json.
    Downloads: 3 This Week
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  • 24
    Listen 1

    Listen 1

    One for all free music in china (chrome extension)

    Listen 1 can search and play songs from Netease Cloud Music, Xiami, QQ Music, Kugou Music, Kuwo Music, Bilibili, Migu Music website, making your music library more comprehensive. It also supports the playlist function, you can easily play, collect and create your own playlist. Download the Chrome plugin version zip package and unzip it. Open the Chrome extension page and check "Developer Mode" in the upper right corner. Select "Load unpacked extension..." and select the folder you just unpacked. Download the Windows zip file and choose the 32-bit or 64-bit version according to the system. The original web player, using Python to develop a web server. Can run directly on the server, or use the packaged Windows and Mac versions to run the web server locally. Windows, Mac, Linux desktop. Using Electron framework, based on Listen 1 Chrome plug-in version JS library development.
    Downloads: 3 This Week
    Last Update:
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  • 25
    Magnific Popup

    Magnific Popup

    Light and responsive lightbox script with focus on performance

    Magnific Popup is a responsive lightbox & dialog script with focus on performance and providing best experience for user with any device. You may put any HTML content in each gallery item and mix content types. Three simple popups with different scaling settings. Fits horizontally and vertically, only horizontally, or with no gaps, zoom animation, close icon in top-right corner. If you wish to open the popup only after image is fully loaded, you may preload image via JS. Or use scaled down image instead of thumbnail. Zoom effect works only with images, for now. Animations are added with simple CSS transitions, you can make them look however you wish. Entered data is not lost if you open and close the popup or if you go to another page and then press back browser button. You have full control of what is displayed in popup, align it to any side via CSS, enable or disable scroll on right side of window, whatever.
    Downloads: 3 This Week
    Last Update:
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