JShelter: Home

<!doctype html> <html lang="en"> <head> <meta charset="utf-8"> <title>JShelter: Home</title> <meta name="description" content="An anti-malware Web browser extension to mitigate potential threats from JavaScript, including fingerprinting, tracking, and data collection!"> <link rel="canonical" href="./"> <meta property="og:title" content="JShelter: Home"> <meta property="og:description" content="An anti-malware Web browser extension to mitigate potential threats from JavaScript, including fingerprinting, tracking, and data collection!"> <meta property="og:type" content="website"> <meta property="og:url" content="./"> <meta property="og:image" content="https://jshelter.org/theme/img/jshelter_preview.png"> <meta http-equiv="x-ua-compatible" content="ie=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta name="generator" content="Pelican"> <link rel="apple-touch-icon" href="icon.png"> <link rel="icon" type="image/x-icon" href="/theme/images/icon.png"> <link href="/theme/css/fork-awesome.min.css" rel="stylesheet"> <link href="/theme/css/minireset.min.css" rel="stylesheet"> <link href="/theme/css/main.css" rel="stylesheet"> <link href="https://jshelter.org/feeds/all.atom.xml" type="application/atom+xml" rel="alternate" title="JShelter Full Atom Feed"> <script type="text/javascript"> /** @licstart The following is the entire license notice for the * JavaScript code in this page * * Copyright (C) 2021 Manufactura Independente * * The JavaScript code in this page is free software: you can * redistribute it and/or modify it under the terms of the GNU * General Public License (GNU GPL) as published by the Free Software * Foundation, either version 3 of the License, or (at your option) * any later version. The code is distributed WITHOUT ANY WARRANTY; * without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GNU GPL for more details. * * As additional permission under GNU GPL version 3 section 7, you * may distribute non-source (e.g., minimized or compacted) forms of * that code without the copy of the GNU GPL normally required by * section 4, provided you include this license notice and a URL * through which recipients can access the Corresponding Source. * * @licend The above is the entire license notice * for the JavaScript code in this page. */ </script> </head> <body> <nav class="navbar" aria-label="navigation"> <div class="container"> <div class="navbar-brand"> <a role="button" class="navbar-burger" aria-label="menu" aria-expanded="false"> <div> <span aria-hidden="true"></span> <span aria-hidden="true"></span> <span aria-hidden="true"></span> </div> </a> <a class="navbar-item" href="/"> <img src="/theme/images/jshelter-logo.svg" alt="Dark orange square with a little white hermitt crab cuttout. JShelter logo"> <p> <strong>JShelter </strong> <span>Your browser extension to keep you safe</span> </p> </a> </div> </div> </nav> <div id="home" class="wrapper"> <div class="content-wrapper container"> <div class="sidebar-overlay"></div> <div class="sidebar">  <nav class="menu" aria-label="navigation"> <ul class="menu-list"> <li class="menu-heading"> <a href="./" class="logo"> <img src="/theme/images/jshelter-horizontal.svg" alt="JShelter"> </a> <ul> <li><a href="./">Home</a></li> <li ><a href="./blog/">Blog</a></li> <li> <a href="./faq/">Frequently Asked Questions</a> </li> <li> <a href="./threatmodel/">Threat model</a> </li> <li> <a href="./install/">Installing</a> </li> <li> <a href="./permissions/">Permissions</a> </li> <li> <a href="./versions/">Release history</a> </li> <li> <a href="./credits/">Credits</a> </li> <li> <a href="./license/">GNU General Public License</a> </li> </ul> <li class="menu-heading"> <strong>Key protection</strong> <ul> <li ><a href="./levels">JavaScript Shield</a></li> <li ><a href="./nbs">Network Boundary Shield</a></li> <li ><a href="./fpd">Fingerprint Detector</a></li> </ul> </li> <li class="menu-heading"> <strong>Developer notes</strong> <ul> <li ><a href="./build/">Building from scratch</a></li> <li ><a href="./new-wrapper/">How to write a new wrapper</a></li> <li ><a href="./coding-style/">Coding style</a></li> <li ><a href="./i18n_developers/">I18n</a></li> <li ><a href="./unit_tests/">Unit tests</a></li> <li ><a href="./integration_tests/">Integration tests</a></li> <li><a href="https://pagure.io/JShelter/webextension">View source code</a></li> </ul> </li> <li class="menu-heading"> <strong>Notes for translators</strong> <ul> <li ><a href="./i18n/">Instructions</a></li> <li><a href="https://hosted.weblate.org/projects/jshelter/">Translate at Weblate</a></li> </ul> </li> </ul> </nav> </div> <main id="main-content" aria-label="main"> <section class="hero block has-text-centered"> <header> <h2 class="logo"> <img src="/theme/images/jshelter-hero.svg" alt="JShelter logo"> <span>JShelter</span> </h2> <p>An anti-malware Web browser extension to mitigate potential threats from JavaScript, including fingerprinting, tracking, and data collection!</p> </header> <div> <p class="download-buttons"> <a id="download-firefox" class="button is-medium" href="https://addons.mozilla.org/firefox/addon/javascript-restrictor/"> <i class="fa fa-firefox" aria-hidden="true"></i> Install in Firefox </a> <a id="download-chrome" class="button is-medium" href="https://chrome.google.com/webstore/detail/javascript-restrictor/ammoloihpcbognfddfjcljgembpibcmb"> <i class="fa fa-chrome" aria-hidden="true"></i> Install in Chrome </a> <a id="download-opera" class="button is-medium" href="https://addons.opera.com/extensions/details/javascript-restrictor/"> <i class="fa fa-opera" aria-hidden="true"></i> Install in Opera </a> </p> <p class="small">Visit the <a href="/install">Install page</a> for other options</p </div> </section> <section id="about" class="block"> <header class="has-text-centered"> <h3>About</h3> </header> <div class="grid"> <article> <header> <h4>What is JShelter?</h4> </header> <div> <p>JShelter is a browser extension to give you control over what your browser is doing. A JavaScript-enabled web page can access much of the browser's functionality, with little control over this process available to the user: malicious websites can uniquely identify you through fingerprinting and use other tactics for tracking your activity. JShelter improves the privacy and security of your web browsing. For more details, see JShelter <a href="/threatmodel/">threat model</a>.</p> </div> </article> <article> <header> <h4>How does it work?</h4> </header> <div> <p>Like a firewall that controls network connections, JShelter controls the APIs provided by the browser, restricting the data that they gather and send out to websites. JShelter adds a safety layer that allows the user to choose if a certain action should be forbidden on a site, or if it should be allowed with restrictions, such as reducing the precision of geolocation to the city area. This layer can also aid as a countermeasure against attacks targeting the browser, operating system or hardware.</p> </div> </article> <article> <header> <h4>How can I get started?</h4> </header> <div> <p>First, install the extension using the button above or checking the various <a href="/install/">installation options</a>.</p> <p>Afterwards, read our <a href="/faq/">FAQ</a>, the <a href="/permissions/">required permissions</a> and the different protection <a href="/levels/">levels</a>.</p> <p>For more details about what's going on under the hood, check out the <a href="/blog/">JShelter blog</a> and <a href="https://arxiv.org/abs/2204.01392">paper</a>.</p> </div> </article> <article> <header> <h4>Who's behind this project?</h4> </header> <div> <p>See the <a href="/credits/">credits page</a>.</p> </div> </article> </div> </section> <section id="contribute" class="block"> <header class="has-text-centered"> <h3>Contribute</h3> </header> <div class="grid"> <article> <header> <h4>I found a bug!</h4> </header> <div> <p>If you have any questions or you spotted a bug, the project's <a href="https://pagure.io/JShelter/webextension/issues">issue tracker</a> is the place for posting those. We especially appreciate feedback, so feel free to use the issue tracker for chiming in.</p> </div> </article> <article> <header> <h4>How can I help?</h4> </header> <div> <p>Using JShelter and reporting any problems you find in our <a href="https://pagure.io/JShelter/webextension/issues">issue tracker</a> is a huge help. If you want to contribute to the project itself, post your ideas on the issue tracker or just go ahead and make a pull request.</p> </div> </article> <article> <header> <h4>What is the license?</h4> </header> <div> <p>JShelter is copylefted software, available under the <a href="/license/">GNU General Public License</a>.</p> </div> </article> </div> </section> </main> </div> <footer class="footer"> <div class="container grid">  <div class="supporters"> <p> This project was <a href="https://nlnet.nl/project/JShelter-Manifest-V3/">funded through the NGI0 Entrust Fund</a>, a fund established by NLnet with financial support from the European Commission's Next Generation Internet programme, under the aegis of DG Communications Networks, Content and Technology under grant agreement No 101069594. This project was funded through the NGI0 PET Fund, a fund established by NLnet with financial support from the European Commission's Next Generation Internet programme, under the aegis of DG Communications Networks, Content and Technology under grant agreement No 825310 as <a href="https://nlnet.nl/project/JSRestrictor/">JavaScript Restrictor</a> and <a href="https://nlnet.nl/project/JShelter">JShelter</a> projects. This project was supported by the <a href="https://www.fit.vut.cz/research/project/1063/.en">MV CR VI20172020062 project</a>. </p> </div> <div class="license"> <p> This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either <a href="https://www.gnu.org/licenses/gpl-3.0">version 3</a> of the License, or (at your option) any later version. </p> <p>View the source code at <a href="https://pagure.io/JShelter/webextension">Pagure.io</a>.</p> <p>There is an <a href="https://jshelter.org/feeds/all.atom.xml">Atom feed</a> available for the blog content.</p> </div> <div class="credits"> <ul> <li> <strong>Active developers</strong> <ul> <li><a href="https://www.fit.vutbr.cz/~polcak">Libor Pol膷谩k</a></li> <li>Giorgio Maone</li> </ul> </li> </ul> <ul> <li> <strong>FSF team</strong> <ul> <li>John Hsieh</li> <li>Michael McMahon</li> </ul> </li> <li> <strong>Design and website development</strong> <a href="https://manufacturaindependente.org/">Manufactura Independente</a> </li> </ul> </div> </div> <div class="container"> <ul class="supporter-logos"> <li> <a href="https://nlnet.nl/"><img src="/theme/images/nlnet-logo.svg" alt="NLnet logo"></a> </li> <li> <a href="https://www.fsf.org/"><img src="/theme/images/fsf-logo.svg" alt="Free Software Foundation logo"></a> </li> <li> <a href="https://www.fit.vut.cz/"><img src="/theme/images/brno-fit-logo.svg" alt="BRNO University of Technology, Faculty of Information Technology"></a> </li> </ul> </div> </footer> </div> <script src="/theme/js/bowser.js"></script> <script> const browser = window.bowser.getParser(window.navigator.userAgent); const browserName = browser.getBrowserName(); const buttons = { firefox: document.querySelector('#download-firefox'), chrome: document.querySelector('#download-chrome'), opera: document.querySelector('#download-opera'), } if (browserName == 'Firefox') { buttons.chrome.remove(); buttons.opera.remove(); } else if (browserName.startsWith('Chrom')) { buttons.firefox.remove(); buttons.opera.remove(); } else if (browserName.startsWith('Opera')) { buttons.firefox.remove(); buttons.chrome.remove(); } </script> <script> // mobile navigation var navBurguer = document.getElementsByClassName('navbar-burger')[0]; var sidebarNav = document.getElementsByClassName('sidebar')[0]; var sidebarOverlay = document.getElementsByClassName('sidebar-overlay')[0]; navBurguer.onclick = function() { navBurguer.classList.toggle('is-active'); sidebarNav.classList.toggle('is-shown'); sidebarOverlay.classList.toggle('is-shown'); } </script> </body> </html>

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JShelter: Home