Disclaimer: This is a research project under development, see the issue page and the webextension home page for more details about the current status.
JShelter is a browser extension to give back 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 aims to improve the privacy and security of your web browsing.
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.
JavaScript Restrictor (JSR) is a browser extension with support for multiple browsers: Firefox, Google Chrome, and Opera. The extension also works with Brave, Microsoft Edge, and most likely any Chromium-based browser. Let us know if you want to add the extension to additional stores.
See our website for additional information and documentation. We recommend reading our paper to get a better idea about the project.
If you have any questions or you have spotted a bug, please let us know. If you found a security bug that you do not want to share publicly, please, send a report to jshelter@gnu.org.
If you would like to give us feedback, we would really appreciate it.
If you want to add a new wrapper, please, follow the guide. If you have an image/artwork that you want to push to the project, we suggest stripping exif data:
exiftool -all= -tagsfromfile @ -Orientation filename.pngThis 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 version 3 of the License, or (at your option) any later version.