To use Android extensions, you'll need Firefox for Android. To explore Firefox for desktop add-ons, please visit our desktop site.

Log in
Add-on icon

Reviews for JShelter

JShelter by Libor Polčák

4.4 Stars out of 5
5
31
4
4
3
3
2
2
1
2
Review by atreyu
by atreyu, 3 years ago
42 reviews
  • by Flowerpot, a month ago
  • by What???, 3 months ago
    Extremely complex but the only working fingerprint spoofing extension out there now that the original Fingerprint Spoofing extension/add-on has been removed from Github because later reiterations are malware and developer has stopped supporting it more than 5 years ago. On Firefox, but not Chrome it ramps up CPU usage and RAM.

    Developer response

    posted 2 months ago
    The CPU and RAM usage should be signifficantly lower startng from 0.19.1 that is just released. Please let us know if you observe issues in 0.19.1. We prefer the issue tracker or email jshelter@gnu.org.
  • by RYX, 4 months ago
    The fingerprint protection this offers is comprehensive and is the only one that I have encountered that protects against the "Creepjs" fingerprinter.
    I have tested it against multiple other sites like browserleaks and fingerprint/demo.
    HOWEVER, about half the internet does not work with this extension because CloudFlare blocks you with a message "This Browser Is Out of Date" which makes you turn off the extension. If you can fix that issue, I'll mark this to 5 stars.

    Developer response

    posted 2 months ago
    Can you try the following?

    * Click on JShelter badge icon -> click "Global settings" in the popup.
    * You should see the option page
    * Locate "Fingerprint Detector" section neear the bottom of the page.
    * Click "Manage exception list ⤵" (it should be the lowest button on the page).
    * Add "challenges.cloudflare.com" to the list.
    * Click "JS Shield details" in the menu
    * On the top, add "challenges.cloudflare.com" and select "Turn JavaScript Shield off" (or test other level if you see fit).

    Try to visit the affected page and report back if you were successful (for example to jshelter@gnu.org). I think that this is a good candidate for a FAQ entry.
  • by BaraShiro, 6 months ago
    (Updated 24-09-24) Very powerful but complex tool. Defeats fingerprinting, but requires some tinkering in order to not break almost every page on the internet. The memory issues seems to be fixed in version 0.19.1.

    Developer response

    posted 2 months ago
    The CPU and RAM usage should be signifficantly lower startng from 0.19.1 that is just released. Please let us know if you observe issues in 0.19.1. We prefer the issue tracker or email jshelter@gnu.org.
  • by Adrian F., 7 months ago
    I had to disable this after the upgrade to Firefox 125.0.1 because it caused very high CPU (100%) and RAM (20G+) usage for multiple hours, without end. I used about:memory to discover that this was the culprit. After I disabled JShelter, the CPU usage and RAM dropped.

    Developer response

    posted 2 months ago
    The CPU and RAM usage should be signifficantly lower startng from 0.19.1 that is just released. Please let us know if you observe issues in 0.19.1. We prefer the issue tracker or email jshelter@gnu.org.
  • by ti-ap, 9 months ago
    A great tool that everyone should be using, even if it's not perfect. I recommend it to anyone that will listen. On rare occasions some sites will break because they're using a really aggressive captcha or spam detection platform. Lowering the settings on JShelter and refreshing fixes this. I also disagree that notifications should be shown by default, if at all. Every site is using fingerprinting of some sort nowadays, so you just get a notification every time you go to a site and the notifications become noise.
  • by wн|τεbʁeλÐe®i5βaЯ1εy, 10 months ago
  • by JCD, a year ago
  • by Oliver Salzburg, a year ago
  • by geeknik, a year ago
  • by Andreas, 2 years ago
  • by Viking Helmet, 2 years ago
    As much as I appreciate the concept behind this and would like to give it a higher rating, it breaks too many websites and virtually anything that uses CAPTCHA. I'll continue to keep it around, but some sites will flat-out ignore your request and others will fail to verify your humanity while it's enabled.
  • by mirkl, 2 years ago
  • by Poligraf Poligrafovich Bouboulov, 2 years ago
  • by Gersonzao, 2 years ago
  • by Firefox user 13482869, 2 years ago
  • by zaskock, 2 years ago
  • by Snehal Shekatkar, 2 years ago
  • by Firefox user 14003953, 2 years ago
  • by Fg, 2 years ago
  • by Lucas, 2 years ago
    Ótima extensão, quebra em alguns sites mas na maioria funciona. Primeira solução que encontrei que realmente eliminou o tracking entre sites.
  • by Emanuel, 2 years ago
  • by Firefox user 17335594, 2 years ago
  • by Hull23, 2 years ago
  • by electromagneticcyclone, 3 years ago
Page 1 of 2