Font Fingerprint Defender
Privacy & Security
Defending against Font fingerprinting by reporting a fake value.
Users
100K
Rating
3.5
Reviews
24
7D Growth
0|0%
Stable signalUnknownHigh-risk permissions
JShelter
Extension for increasing security and privacy level of the user.
Users10KCurrent public install base
Rating4.5Store average score
Reviews34Public review volume
Manifest versionV3Extension platform version
7-day growth0Net users gained this week
7-day growth rate0%Relative weekly velocity
Preview
6 assetsJShelter Media preview
Trend
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User Growth Over Time
Rating trend
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7-day rating change
Start
4.50
Latest
4.50
7-day rating change
0.00
2026年7月13日2026年7月19日
Growth overview
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1-day growthNo data
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00%30-day growthNo data
----Technical snapshot
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Version0.21
ManifestV3
Size476KiB
Languages7English / français / polski +4
Published
Store updated
Last crawled
Englishfrançaispolskiportuguês (Brasil)suomičeštinaрусский
Overview
Product summary
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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?
Reviews
Recent review snapshot
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Store average score4.5Chrome Web Store aggregate rating, including ratings without synced review text
Synced text average4.1Average computed only from synced review bodies below
Reviews with text18Synced review bodies
Total ratings / reviews34Chrome Web Store public rating/review count
Store average score: 4.5. The bars below are calculated from synced review text only, so they may be empty for extensions that have public ratings but no synced comments yet.
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New update on Jan 9, but still broken. JShelter keeps breaking modern sites and making them think my browser is outdated even in "recommended" level mode. Whitelisting doesn't work at all!. What's troubling is the level advance tracking/fingerprinting has gone now. With Google Search I get hit with difficult capchas each time. All this has become normalized. No extension (at least on Chromium) works, So I gave up. Uninstalled.
I don't know where to start. It worked, then didn't after the mandatory MV3, then worked again.Then stopped, started. Rinse and repeat. Adding an exception to disable on certain sites, it continues to block. It's terribly unreliable.
worked for me five stars ,don't forget to turn on allow user scripts
Be as secure as epstein :) Yipeeee
Fingerprinting protection for Vivaldi that actually works.
Great addon!
Благодарность разработчикам. Правда, поднагружает процессор (это неточно, проверьте)
this is a really good extension! it worked on install without me having to make any changes, and going to a site like EFF Cover Your Tracks showed that my fingerprint had indeed been randomized. there are also a lot of additional settings to customize too, if you want to go even deeper. happy that extensions like this exist that focus on privacy and have good ease-of-use!
Pretty good extension. If you're a user that found NoScript to be a little too time consuming to get setup properly etc. I'd try this out. It's basically a "set it and forget it" form of NoScript that does all the blocking you need with no initial setup or tinkering, although you can still tinker AND there are plenty of settings to tinker with.
Unusable black hole. In the first 2 hours of using (Vivaldi 5.6.2867.62 on Win7-x64): 1. Kills reCaptcha service (until JS Shield prohibited - the very essense of the extension) 2. Kills DisQus service (until JS Shield prohibited - the very essense of the extension) 3. The bug reports page can not be found from the main site 4. When finally found - it requests you to create new account (logging in with OpenID/OAuth through other sites? no, not in 21 century) just for the privileger of laying 1-2 bug reports 5. When you do - it denies to ackknowledge the already xreated and activated account and instead goes infinite circles through HTTP login screens. Well... if that is how they bug-fixing page "works" and if it is how the casual browsing becomes just after 2 hours with this "www-killer feature" you may extrapolate how it would go further...