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
User growth trend
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User Growth Over Time
Rating trend
7-day 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
----7-day growthFlat
00%30-day growthNo data
----Technical snapshot
Version, languages, and crawl freshness
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Version0.21
ManifestV3
Size476KiB
Languages7English / français / polski +4
Published
Store updated
Last crawled
Englishfrançaispolskiportuguês (Brasil)suomičeštinaрусский
Overview
Product summary
Review the store description, core capabilities, and common use cases.
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
Inspect the latest comments and rating distribution.
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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The best plugin i ever seen i liked the fingerprint option (sorry for bad eng)
It is causing high cpu and memory usage in some pages until freezing the system, both chrome and firefox and still not fixed. Could not recommend this extention with lot of bugs. https://pagure.io/JShelter/webextension/issues
Does the job. BUT annoyingly breaks login and forms for websites using reCAPTCHA. Guess we can't have both.
Very well made extension that actually works, I've tested it out on multiple sites. A big win for privacy. Thanks for all the work you do
Seems useful. Will stay with it for a little while to test.
Спасибо разработчикам. Конфиденциальность в наше время - роскошь.
Un estensione davvero incredibile! Quello che cercavo. Funziona veramente. Blocca effettivamente i popup in javascript sito per sito. Anche la precedente che avevo bloccava effetrivamente i js ma poi era diventata fastidiosa per il sito che volevo bloccare bloccando però tutti il mondo, li dovevo mettere in whitelist. Questa invece...è perfetta ho impostato: non blocco tutto il mondo però blocco gli js solo un sito. Tornando all'estensione..questa....ha una grafica di semplice, facile e immediato utilizzo. Un enorme grazie.
Not only great idea, but the extension is already working. I appreciate friendly graphical user interface - it easy to understand setting of this extension. The best idea is testing page (https://polcak.github.io/jsrestrictor/test/test.html), where I could immediately try that extension works perfectly - it has hided my sensitive information that may have been misused by potential attackers on the website. Now I feel safer.