Open Source JavaScript Browsers - Page 5
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JavaScript Browsers
View 207 business solutionsBrowse 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.
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Ship Agents FasterGemini 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.
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Save Up to 91% on Cloud Compute With Spot VMsRun batch jobs at 60-91% off with Spot VMs. Long-running workloads get automatic discounts with sustained use.
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Playwright Skill for Claude Code
Claude Code Skill for browser automation with Playwright
Playwright Skill is an open-source plugin designed for Claude Code that enables dynamic browser automation using Playwright through natural language instructions. The tool allows an AI agent to generate, execute, and manage browser automation scripts on demand, rather than relying on predefined workflows or static test scripts. It is structured as a modular skill within the Claude ecosystem, meaning it can be installed as a plugin and invoked automatically when browser automation tasks are required. The system supports a wide range of use cases, including testing web applications, validating user interfaces, automating workflows, and extracting data from websites. One of its key advantages is its ability to generate custom Playwright code tailored to each request, allowing flexible and context-aware automation. -
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SPX
A simple & straight-to-the-point PHP profiling extension
SPX, which stands for Simple Profiling eXtension, is just another profiling extension for PHP. It differentiates itself from other similar extensions as being totally free and confined to your infrastructure (i.e. no data leaks to a SaaS). Very simple to use: just set an environment variable (command line) or switch on a radio button (web request) to profile your script. Thus, you are free of manually instrumenting your code (Ctrl-C a long running command line script is even supported). Using a dedicated browser extension or command line launcher. Multi metrics capable: 22 are currently supported (various time & memory metrics, included files, objects in use, I/O...). Able to collect data without losing context. For example Xhprof (and potentially its forks) aggregates data per caller / callee pairs, which implies the loss of the full call stack and forbids timeline or Flamegraph based analysis. -
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Toolkit for YNAB
A general purpose YNAB enhancing browser extension for Chrome
Toolkit for YNAB is a browser extension that enhances your experience with the YNAB Web Application. YNAB have released an exciting new web version. Lots of power users of the older versions are asking for options that are easily implemented in a browser extension. Rather than ask the YNAB team to implement these features, let's just do it ourselves! The Toolkit is available for Chrome and Firefox. The extension is built using Browser (Web) Extension APIs which means support for Edge should be imminent as well. Since the extension is built with Web Extensions and that is not supported by Safari, the extension itself is not supported on Safari. When/if Safari decides to support Web Extensions we will do what we can to provide support for their browser. We've decided that it's better to use the latest and greatest than to wait for browsers to support all the nice newer syntax landing in Javascript. -
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Yomichan
Japanese pop-up dictionary extension for Chrome and Firefox
Yomichan turns your web browser into a tool for building Japanese language literacy by helping you to decipher texts which would be otherwise too difficult tackle. This extension is similar to Rikaichamp for Firefox and Rikaikun for Chrome, but it stands apart in its goal of being an all-encompassing learning tool as opposed to a mere browser-based dictionary. Interactive popup definition window for displaying search results. On-demand audio playback for select dictionary definitions. Kanji stroke order diagrams are just a click away for most characters. Custom search page for easily executing custom search queries. Support for multiple dictionary formats including EPWING via the Yomichan Import tool. Automatic note creation for the Anki flashcard program via the AnkiConnect plugin. Clean, modern code makes it easy for developers to contribute new features. -
Paessler: Easy to Use With Enterprise Power. Free TrialYou shouldn't have to choose between a monitoring tool that's easy to use and one that's powerful enough for a complex environment. PRTG's low-code interface lets any admin build dashboards, set alerts and monitor devices without scripting, while custom sensors and full API access are there when your team needs deeper control. One platform, no compromise. Download a free 30-day trial now.
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ZetaJS
JS wrapper for ZetaOffice in the browser
The zeta.js library provides the facilities to run an instance of ZetaOffice integrated into your web site, allowing you to control it with JavaScript code via the LibreOffice UNO technology. Use cases range from an in-browser office suite that looks and feels just like its desktop counterpart, to fine-tuned custom text editing and spreadsheet capabilities embedded in your website, to a headless zetajs instance that does document conversion in the background. -
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bootstrap-select
The jQuery plugin that brings select elements into the 21st century
The jQuery plugin that brings select elements into the 21st century with intuitive multiselection, searching, and much more. Now with Bootstrap 4 support. Bootstrap-select requires jQuery v1.9.1+, Bootstrap’s dropdown.js component, and Bootstrap's CSS. If you're not already using Bootstrap in your project, a precompiled version of the Bootstrap v3.4.1 minimum requirements can be downloaded. If using bootstrap-select with Bootstrap v4+, you'll also need Popper.js. For all of Bootstrap v4's requirements, see Getting started. A precompiled version of the requirements will be made available in an upcoming release of bootstrap-select. Bootstrap 4 only works with bootstrap-select v1.13.0+. By default, bootstrap-select automatically detects the version of Bootstrap being used. However, there are some instances where the version detection won't work. -
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buffer
The buffer module from node.js, for the browser.
buffer is a JavaScript implementation of Node.js Buffer functionality designed to provide binary data handling capabilities in browser environments and cross-platform applications. The library enables developers to work with raw binary data, typed arrays, encodings, and byte manipulation using an API compatible with Node.js core Buffer behavior. It is widely used in browserified applications, cryptographic tooling, networking utilities, media processing, and cross-platform JavaScript libraries that require consistent binary data operations. The project maintains compatibility with Node.js semantics while optimizing for modern browser environments and bundlers. Its implementation supports conversions between strings, arrays, ArrayBuffers, and binary representations using multiple encoding formats. buffer has become foundational infrastructure in the JavaScript ecosystem for applications requiring low-level data processing outside of native Node.js environments. -
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SVG editor for ownCloud
Create and edit SVG graphics directly in ownCloud. Based on svg-edit.
This project provides an ownCloud-app (http://apps.owncloud.com) for editing and creating SVG vector graphics in your browser. It's based on the awesome "svg-edit"-project (http://code.google.com/p/svg-edit/). Features like collaborative editing may be implemented later. -
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This is a extension for Mozilla Firefox that allows to check the MD2, MD5, SHA1, SHA256, SHA384 or SHA512 sum of a downloaded file.
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Train ML Models With SQL You Already KnowBuild and deploy ML models using familiar SQL. Automate data prep with built-in Gemini. Query 1 TB and store 10 GB free monthly.
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retire.js for Firefox
Find vulnerable JavaScript libraries on any page: Firefox and Android
retire.js shows which JavaScript libraries a web page uses and which of them have known vulnerabilities (CVE, GitHub Security Advisories), how severe they are and which version to upgrade to. The vulnerability database of the Retire.js project is downloaded every day, so new vulnerabilities appear without an add-on update. Optional OSV.dev lookups cover every npm package, and send only the library name and version. Libraries are found from file names, CDN addresses, file content and hashes, license banners, inline scripts and global variables. The panel offers filters, sorting, JSON and CSV export, a dark theme and a touch-friendly layout on Firefox for Android. Manifest V3, Apache 2.0. -
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Password Extractor
Transfer passwords to and from K-Meleon
Transfer passwords between browsers. This extension for K-Meleon can also be installed on other browsers that use XUL including SeaMonkey, Pale Moon, Mypal, Roytam's New Moon, and Waterfox Classic. The Password Extractor XML export/import format is also used by Password Exporter (for Firefox and SeaMonkey) and Password Backup Tool (for Pale Moon and Basilisk). The CSV export format is compatible with popular browsers and password managers including Mozilla Firefox, Google Chrome, Microsoft Edge, Opera, Brave, Vivaldi, KeePass, and KeePassXC. To import passwords from another browser's CSV password export use the Password Extractor conversion tool for your browser. -
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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.
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Greasemonkey Port
Greasemonkey Port for the SeaMonkey Browser
Please note that there are no guarantees that XPI installations will work in advertised minVersion and maxVersion. Farby did include some basics for SeaMonkey however a few things seem to be missing. The current HEAD here will probably not work directly in Firefox and nor should you be using this fork in Firefox. It is intended for SeaMonkey users only. Announcements at https://openuserjs.org/announcements/Greasemonkey_Port_Update -
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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". -
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Crusta Browser
Lightweight webbrowser in Qt5
Lightweight, fast, simple and secure webbrowser in Qt5. Visit https://crustabrowser.com for more details -
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Cflow2vcg convert the result of the cflow utility in a VCG format. It offers the ability to view graphically the call-graph of sources, and import it in documentation.
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Social Browser
Profiles, AI & MCP in One Browser
Social Browser is a Windows desktop browser for managing multiple accounts from one place without mixing sessions. Each Profile keeps its own login session, cookies, storage, and settings isolated. AI automation in Automation Studio runs repeat browser work inside persistent Profiles. MCP AI-compatible clients can search, read, automate, and control the browser. Organize Profiles with groups, tags, search, and filtering; add your own proxy per Profile when needed. It also includes workflows, browser and JavaScript automation, bulk actions, alerts, privacy protection, ad blocking, User Scripts, extensions, and Free and VIP Social Tools. Latest release: v26.09.16 for Windows x64. -
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PDF Download is a Firefox extension that improve your surfing experience: when you click on a link to a PDF file, it allows to choose if you want to view the PDF file inside the browser (as PDF or as HTML), outside Firefox or if you want to download it.
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myrtille
A native HTML4 / HTML5 Remote Desktop Protocol client
Myrtille is a simple way to connect remote desktops and applications from a native web browser, without plugin, extension or configuration. For the end user, there is just need for a browser. Server side, it uses the .NET (C#) framework and the RDP protocol through an HTTP(S) gateway. It's very comparable to Guacamole (https://github.com/glyptodon) or FreeRDP-WebConnect (https://github.com/FreeRDP/FreeRDP-WebConnect), except it uses the Microsoft .NET (C#) technologies for a better integration with the Remote Desktop Services (RDS) layer. It also support HTML4, in addition to HTML5, for backward compatibility. -
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LOGames is a project that aims e-learning game development based on Learning Object Technology. LOGames are built up an existents patterns , like SCORM (Shared Content Object Model) and DCC (Digital Content Component), using InfraBig infrastructure.
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RefreshGeek
Auto refresh any tab on a timer, with page change alerts
Refresh any tab on a timer, with a countdown on the toolbar icon. Watch the whole page, or one part of it, and get a desktop alert when it changes or when the words you are waiting for appear. 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/refreshgeek/ -
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PunyCode Domain Detection
Firefox add-on that stops look-alike (homograph) web addresses
PunyCode Domain Detection is a Firefox add-on (desktop and Android) that stops look-alike web addresses before they open: аpple.com with a Cyrillic а, mozılla.com with a dotless ı, paypa1.com with a digit one. The address is checked before the request is sent, and a full-page warning stays until you decide: go to the real site, go back, or open anyway. The look-alike letters are highlighted and explained. Legitimate international names such as münchen.de are not flagged. Detection follows the Unicode security data (UTS #39) and protects 222 commonly phished sites plus your own. Everything is checked on your device: no network requests, no data collected. Manifest V3, MIT. -
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JavaScript QR Code
Create and scan QR codes in Firefox, 100% in your browser
Firefox add-on (desktop and Android) to create beautiful QR codes and scan them, entirely inside the browser: no external server, no account, no ads, no data collected. Wi-Fi, contacts, events, SEPA payments, custom designs verified before download, PNG/SVG export, batch ZIP, camera scanner with warnings on deceptive links. Version 2.0 rewritten from scratch (Manifest V3). -
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Nightingale
A community supported fork of the Songbird media player and library.
Nightingale is a community created fork of the Songbird media player. It is developed by a proud community and we are equally proud to bring you the most extensible, feature-rich media experience on Windows, Mac, and Linux. See the official website at http://getnightingale.com for the source, builds, and information. On Sourceforge, we provide our releases, the binary deps for building, as well as builds for testing purposes.
