History

7 snapshots

Tracking since Apr 21, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 21, 2026	8.0K	4.68	31	0.21
May 6, 2026	10.0K	4.56	32	0.22
May 10, 2026	10.0K	4.58	33	0.22
May 22, 2026	10.0K	4.47	34	0.22
Jun 5, 2026	10.0K	4.47	34	0.22.1
Jun 9, 2026	10.0K	4.47	34	0.23
Jun 18, 2026	10.0K	4.47	34	0.23.1
Now	10.0K	4.50	34	0.23.1

Changelog

Jun 5, 2026

description

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.

Please see the FAQ (https://jshelter.org/faq/) and our blog (https://jshelter.org/blog/) for more information about the extension.

What is the threat model?

https://jshelter.org/threatmodel/

Can I read a paper about the extension?

Yes, see https://arxiv.org/abs/2204.01392

Note that JShelter can also be used to learn the origin of the calls for JavaScript APIs that are often misused for browser fingerprinting with Fingerprint Detector report. The detected calls in a web page can be exported as JSON.

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?

Similarly to a firewall that controls network connections, JShelter controls the APIs provided by the browser, restricting the data that javascript code executed on visited web pages can see, gather, and possibly misuse. JShelter adds a safety layer that allows the user to choose if a certain APIs 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.

Please see the FAQ (https://jshelter.org/faq/) and our blog (https://jshelter.org/blog/) for more information about the extension.

What is the threat model?

https://jshelter.org/threatmodel/

Can I read a paper about the extension?

Yes, see https://arxiv.org/abs/2204.01392

Note that JShelter can also be used to learn the origin of the calls for JavaScript APIs that are often misused for browser fingerprinting with Fingerprint Detector report. The detected calls in a web page can be exported as JSON.

Jun 5, 2026

permissions

storage, tabs, webRequest, declarativeNetRequest, webNavigation, notifications, scripting, userScripts

storage, tabs, webRequest, declarativeNetRequest, webNavigation, notifications, scripting

Permissions & access

Permissions: storagetabswebRequestdeclarativeNetRequestwebNavigationnotificationsscripting
Host access: <all_urls>

Screenshots

About

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?

Similarly to a firewall that controls network connections, JShelter controls the APIs provided by the browser, restricting the data that javascript code executed on visited web pages can see, gather, and possibly misuse. JShelter adds a safety layer that allows the user to choose if a certain APIs 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.

Please see the FAQ (https://jshelter.org/faq/) and our blog (https://jshelter.org/blog/) for more information about the extension.

What is the threat model?

https://jshelter.org/threatmodel/

Can I read a paper about the extension?

Yes, see https://arxiv.org/abs/2204.01392

Note that JShelter can also be used to learn the origin of the calls for JavaScript APIs that are often misused for browser fingerprinting with Fingerprint Detector report. The detected calls in a web page can be exported as JSON.