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.

  • Gemini 3 and 200+ AI Models on One Platform Icon
    Gemini 3 and 200+ AI Models on One Platform

    Access Google's best plus Claude, Llama, and Gemma. Fine-tune and deploy from one console.

    Build generative AI apps with Vertex AI. Switch between models without switching platforms.
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    AI-powered service management for IT and enterprise teams

    Enterprise-grade ITSM, for every business

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  • 1
    Open IT Online
    Open IT Online is a Firefox extension that allows to open and edit your documents from everywhere: no need to have any software installed anymore to see documents, spreadsheets, presentations, etc.
    Downloads: 0 This Week
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  • 2
    Firefox toolbar to send videos from your browser to a Sony Bravia TV which supports the functionality.
    Downloads: 0 This Week
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  • 3
    Open in Colab

    Open in Colab

    Open notebook in Colab from GitHub and Gist

    Add-on that adds a button, «Open in Colab», to the header of IPython notebook in Gist and GitHub Open Jupyter Notebook in Colab from Gist and GitHub adding a button «Open in Colab» with this browser WebExtension
    Downloads: 0 This Week
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  • 4
    OpenAjax Alliance
    OpenAjax Alliance's (http://www.openajaxalliance.org) open source project that implements technologies defined by OpenAjax Alliance. The first effort is the OpenAjax Hub, a JavaScript module that enables multiple Ajax runtimes on the same Web page.
    Downloads: 0 This Week
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  • Catch Bugs Before Your Customers Do Icon
    Catch Bugs Before Your Customers Do

    Real-time error alerts, performance insights, and anomaly detection across your full stack. Free 30-day trial.

    Move from alert to fix before users notice. AppSignal monitors errors, performance bottlenecks, host health, and uptime—all from one dashboard. Instant notifications on deployments, anomaly triggers for memory spikes or error surges, and seamless log management. Works out of the box with Rails, Django, Express, Phoenix, Next.js, and dozens more. Starts at $23/month with no hidden fees.
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  • 5
    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: 0 This Week
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  • 6
    Opena11y

    Opena11y

    Use Tota11y everywhere to maximize accessibility.

    Opena11y is add-on for browser Firefox, is based on Tota11y js library for doing some easy fixes to make your webpages more accessible. Release 0.9.6 - 20/08/2020 - Updated all tota11y library definitions
    Downloads: 0 This Week
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  • 7
    ===NOTICE=== After releasing a few updates, but far less than we wanted, we’ve made the decision to stop the OptimizeGoogle Project. The reasons for the decision were that there were not enough people on the team to keep it going. Google is changing things every day and it has become more and more frustrating to look at all the functions go broke piece by piece. The code will remain GPL, perhaps another person or team is interested in picking this up. For now, thank you for all your patience, feedback and support. Description: OptimizeGoogle is a Firefox extension that enhances Google search results and other pages by adding extra information and removing unwanted information. Created to maintain and improve CustomizeGoogle which seems to have been abandoned.
    Downloads: 0 This Week
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  • 8
    Nex is a web-browser, written on C#. It uses .Net Framework, Microsoft Web Browser (ActiveX Control), stores all configuration in XML format and has MDI interface. Nex is an executable part of Oridea Platform and designed to run Oridea applications.
    Downloads: 0 This Week
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  • 9
    Orseis browser extensions
    Browser extensions / addons for using the Orseis on-line services. Respects the user's privacy. For now, browser targets are Firefox (one XUL-based extension and one Jetpack-based extension) and Google Chrome.
    Downloads: 0 This Week
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  • Cut Data Warehouse Costs by 54% Icon
    Cut Data Warehouse Costs by 54%

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  • 10
    Oryanoo@Webmail is a Webmail Program. It is written in PHP and provides a professionnal webmail access to IMAP and POP3 accounts. Oryanoo@Webmail provide the traditionals webmail services with a web-interface look than a Mozilla-Thunderbird.
    Downloads: 0 This Week
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  • 11
    Outline Sidebar

    Outline Sidebar

    Creates table of contents in the sidebar

    Outline is a Firefox WebExtension that outlines the page. To install add-on follow this link - https://mzl.la/2RSwScT Also is available as Cloudflare App - https://www.cloudflare.com/apps/outline-tool It generates a table of contents by extracting all the headings in the page. Automatically creates table of contents in the sidebar that can be clicked through, for easy document navigation. How to use ---- 1. Click the Outline button beside your address bar to activate it. You will see a box coming from left with the outline in it. 2. Click on any of the headings in the outline to jump to the corresponding section on the page. 3. Click the cross button on the bottom left to close the outline. ### Limitations - WebExtension only works on sites that allow content scripts.
    Downloads: 0 This Week
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  • 12
    This code user selected windt and height value , auto changin and show web browser. Older browsers do not support image resizing after rendering. The resizing works in any case in Opera 7+, IE 6, Mozilla and Firefox.
    Downloads: 0 This Week
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  • 13
    PCi Chrome Extension
    Chrome Extension dedicated to PC INpact website (http://www.pcinpact.com)
    Downloads: 0 This Week
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  • 14
    JavaScript Solitaire Encryption using XML
    Downloads: 0 This Week
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  • 15
    Extensive logging of your visitor browser capablities. Using client side javascript and php.
    Downloads: 0 This Week
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  • 16

    PUBG Multiview Chrome Extension

    PUBG Multiview Chrome Extension

    PUBG Multiview Chrome Extension ( Beta Testing )
    Downloads: 0 This Week
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  • 17
    PageZoom is an extension for Mozilla Firefox that gives you a handy page zoom functionality.
    Downloads: 0 This Week
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  • 18
    Palesomething

    Palesomething

    All your branding are belong to Palesomething.

    This extension will give Pale Moon an identity crisis by generating a new randomized browser name every time you open a new window. Confuse your friends and family with names like "Intel Firebadger" and "Xerox Poweroyster". It's as fun as you want it to be!
    Downloads: 0 This Week
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  • 19

    PassJS

    Giving a Cross-Browser JavaScript

    This library tries to hide differences between JavaScript implementations across browsers. This library is Licenced under the GNU GPLv3 Licence.
    Downloads: 0 This Week
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  • 20
    Performance Timing Test

    Performance Timing Test

    Get accurate performance timing for any page with this add-on Firefox

    Measures the timing performance of any web page using Web APIs. You can immediately save the chart test result within your file system for a comparison with other subsequent tests. Get Opera extension: http://bit.ly/1O9OvRx Get Firefox extension: http://mzl.la/1Vs0UV2 == Installation == 1. Click on download directly from your Firefox browser and install add-on 2. Then click on the icon of the extension included in toolbar to start test
    Downloads: 0 This Week
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  • 21
    This is an effort to Localize Mozilla for the persian/iranian community out there.
    Downloads: 0 This Week
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  • 22
    PeteHistory is a Firefox toolbar that automatically shows shortcuts to the sites you frequently visit, by analyzing your history.
    Downloads: 0 This Week
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  • 23

    Phinder

    A web-based, single-file, cross-browser, AJAX-driven file manager.

    Downloads: 0 This Week
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  • 24
    PlayPage is an extension for Firefox browser that let you play all videos linked in a web page. It supports frames, iframes and, soon, tabbed pages. It permits to specify the player to be used and the customization of player params and play list format.
    Downloads: 0 This Week
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  • 25
    Playwright for Go

    Playwright for Go

    Playwright for Go a browser automation library to control Chromium

    Playwright is a Node.js library to automate Chromium, Firefox, and WebKit with a single API. Playwright is built to enable cross-browser web automation that is ever-green, capable, reliable and fast. Headless execution is supported for all browsers on all platforms. Playwright is built to automate the broad and growing set of web browser capabilities used by Single Page Apps and Progressive Web Apps. Scenarios that span multiple page, domains and iframes. Auto-wait for elements to be ready before executing actions (like click, fill). Intercept network activity for stubbing and mocking network requests. Emulate mobile devices, geolocation, permissions. Support for web components via shadow-piercing selectors. Native input events for mouse and keyboard. Upload and download files. The bridge between Node.js and the other languages is basically a Node.js runtime combined with Playwright which gets shipped for each of these languages (around 50MB).
    Downloads: 0 This Week
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