https://jshelter.org/

Dark orange square with a little white hermitt crab cuttout. JShelter
logo

JShelter Your browser extension to keep you safe

  * JShelter
      + Home
      + Blog
      + Installing
      + Permissions
      + Protection levels
      + Release history
      + Credits
      + GNU General Public License
  * Key protection
      + AJAX
      + Battery level
      + Beacon API
      + Device memory
      + ECMAscript arrays
      + ECMAscript date
      + ECMA shared buffers
      + Geolocation
      + HTML Canvas
      + HTML Performance
      + HTML Workers
      + HTML window name
      + Media devices
      + np
      + PT2
      + WebAudio
      + WebGL
  * Developer notes
      + Building from scratch
      + How to write a new wrapper
      + Coding style

{{ SITENAME }} JShelter

An anti-malware Web browser extension to mitigate potential threats
from JavaScript, including fingerprinting, tracking, and data
collection!

Install in Firefox Install in Chrome Install in Opera

Visit the Install page for other options

What is JShelter?

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.

How does it work?

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.

How can I get started?

First, install the extension using the button above or checking the
various installation options.

Afterwards, read about how to configure JShelter, the required
permissions and the different protection levels.

Who's behind this project?

See the credits page.

I found a bug!

If you have any questions or you spotted a bug, the project's issue
tracker is the place for posting those. We especially appreciate
feedback, so feel free to use the issue tracker for chiming in.

How can I help?

Using JShelter and reporting any problems you find in our issue
tracker 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.

What is the license?

JShelter is copylefted software, available under the GNU General
Public License.

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
JavaScript Restrictor and JavaScript Shield projects. This project
was supported by the MV CR VI20172020062 project.

NLnet logo

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 version 3 of the License, or (at
your option) any later version.

View the source code at Pagure.io.

  * Developers
      + Libor Polcak
      + Martin Bednar
      + Giorgio Maone
      + Zbynek Cervinka
      + Martin Timko
      + Pavel Pohner
      + Pater Hornak

  * FSF team
      + John Hsieh
      + Michael McMahon
      + Ruben Rodriguez
  * Design and website development Manufactura Independente