Canvas Blocker - Fingerprint Protect
Prevent HTML canvas element from generating a unique identification key to protect user's privacy
This browser extension safeguards user privacy by preventing malicious scripts from using the HTML canvas element for user fingerprinting. It introduces slight changes to the data generated by the canvas element when specific methods are invoked, rendering it unusable for fingerprinting. In comparison to similar extensions, this one is lighter and employs a more efficient method to obstruct fingerprinting across all frame elements (top and subframes). The extension operates in three modes:
1. Random noise
2. Random noise (per page) to maintain a consistent identity within the current page session
3. Fixed noise to sustain a constant yet unique identity continuously
Key Features:
1. Minimal footprint fingerprint defender
2. Ability to block or disable fingerprinting on specific hostnames
3. Notification when canvas fingerprinting is detected
4. Option to disable notification for select or all hostnames
5. Compatibility with cross-origin (CORS) and sandboxed iframes (such as Disqus and Hangouts)
Notes:
This extension doesn't entirely block the canvas element. Instead, it modifies two methods to prevent the JavaScript engine from creating a unique identification key from this element.
What is Canvas Fingerprinting:
Canvas fingerprinting is a method among several browser fingerprinting techniques used for tracking online users. It enables websites to identify and monitor visitors by leveraging the HTML5 canvas element rather than browser cookies or similar means. This technique functions by exploiting the HTML5 canvas element. When a user visits a webpage, the fingerprinting script initially writes text using the preferred font and size and adds background colors. Subsequently, the script calls the Canvas API's ToDataURL method to retrieve canvas pixel data in dataURL format, essentially a Base64 encoded representation of binary pixel data. Lastly, the script hashes the text-encoded pixel data, creating a unique fingerprint.
Latest reviews
I was using https://coveryourtracks.eff.org/ to test how unique my browser's fingerprinting was, and when I first installed this extension, nothing appeared to change, so I uninstalled it, checking the box that it didn't behave as expected. I then installed the Canvas Fingerprint Defender extension, which works pretty well. I then re-installed Canvas Blocker and disabled Canvas Fingerprint Defender and coveryourtracks gave the desired results, giving even fewer bits of fingerprinting than either extension alone. It could just be an artifact of how coveryourtracks reports things, but it is looking like Canvas Fingerprint Defender anonymizes something, which remains better-anonymized even after disabling it, which then allows Canvas Blocker to better defeat coveryourtracks? Whatever the metrics and tests, it shouldn't really matter how unique it is reported to be, since Canvas Blocker should be generating new randomized values every time, meaning that even if it is unique, they still can't track you due to it always changing. The two extensions do slightly different things, and are both quite good at what they do.
One of few that really works and generates a new signature at every detection trying.
good
Activating the extension (setting "Random fingerprint") does seem to change the fingerprint on every reload on this site "https://browserleaks.com/canvas". However, on this site "https://fingerprint.com/" it keeps recognizing me. Even in Incognito/Private mode, after closing the browser or tab (and changing public IP-address using VPN). Although I do get the popup from this extension stating that the fingerprint is blocked. So, not sure if this extension is adequate if it only changes the hash in using these very specific steps. Using Brave on Win10, by the way. And fingerprint-setting is set to "Strict"
Fixed Fingerprint - This option isn't useful at all. You do NOT get randomnized Fixed Fingerprint by enabling this option. Your Fingerprint is same for ALL chrome based browser run within the same computer. You can test it using Comodo Dragon (chrome based) or portable version of Chrome.
Fixed Fingerprint - This option isn't useful at all. You do NOT get randomnized Fixed Fingerprint by enabling this option. Your Fingerprint is same for ALL chrome based browser run within the same computer. You can test it using Comodo Dragon (chrome based) or portable version of Chrome.
Doesn't work. Still have a unique fingerprint.
Doesn't work. Still have a unique fingerprint.
Doesn't pass the persistent noise spoof test: Is fingerprint spoofed by persistent noise : false https://webbrowsertools.com/canvas-fingerprint/
я не могу понят разницы между двумя первыми режимами - по логике - первый должен всегда при запросе отпечатка выдавать разные при каждом запросе, второй должен сделать новый при входе на сайт и все время его выдавать при запросах, третий режим выдает оригинальный отпечаток. Так вот второй режим у меня всегда дает рандомные отпечатки, а почему? либо я не понимаю, что такое "per session"
First of all, Thanks for making a great tool! But, but if you have multi profiles of Chrome and install this extension to these profiles and using "Fixed Fingerprint" mode in setting of extension, the Fingerprint code is the same on all profiles. Finally, The "Fixed Fingerprint" feature work wrong on multi profiles. Please fix this.
First of all, Thanks for making a great tool! But, but if you have multi profiles of Chrome and install this extension to these profiles and using "Fixed Fingerprint" mode in setting of extension, the Fingerprint code is the same on all profiles. Finally, The "Fixed Fingerprint" feature work wrong on multi profiles. Please fix this.
It's an awesome extension, just please, let us be able to disable notifcations, they get really annoying.
It's an awesome extension, just please, let us be able to disable notifcations, they get really annoying.
Cover your tracks from EFF says your extension doesn't work.
как проверить что оно работает? Кажись вообще пользы никакой.
Best fingerprint blocker for Chrome. Thank You!
Best fingerprint blocker for Chrome. Thank You!
Doesn't work against canvas !! Try on this website : 1) Open a private new tab (0 cookie then) then go on https://fingerprintjs.com/demo 2) Close the windows 3) Reopen a new private tab (0 cookie again) then rego on https://fingerprintjs.com/demo Doesnt work, website knows who you are. Try this with CanvasBlocker on Firefox, it won't recognize you. If you use Brave, you can close your browser and reopen it it will reset the hash so the website wont recognize you.
Doesn't work against canvas !! Try on this website : 1) Open a private new tab (0 cookie then) then go on https://fingerprintjs.com/demo 2) Close the windows 3) Reopen a new private tab (0 cookie again) then rego on https://fingerprintjs.com/demo Doesnt work, website knows who you are. Try this with CanvasBlocker on Firefox, it won't recognize you. If you use Brave, you can close your browser and reopen it it will reset the hash so the website wont recognize you.
RE: the comment about https://browserleaks.com/canvas, if you refresh the page, you will see this extension causes the canvas to generate a unique fingerprint each time you visit the page, compared to the same fingerprint every time with the extension disabled.
RE: the comment about https://browserleaks.com/canvas, if you refresh the page, you will see this extension causes the canvas to generate a unique fingerprint each time you visit the page, compared to the same fingerprint every time with the extension disabled.
Best canvas blocker, and also compatble with, respectively does not block, the ebay identity check (Google recaptcha) when logging in.
According to https://browserleaks.com/canvas I am 100% unique with this addon installed.
Работает
Полезно
fine :) But what about an option for disabling Canvas Blocker (Fingerprint Protect) on some sites?
fine :) But what about an option for disabling Canvas Blocker (Fingerprint Protect) on some sites?
Confirmed to work and has a whitelist - perfect! Also very light weight.
Confirmed to work and has a whitelist - perfect! Also very light weight.
The notifications are driving me nuts. How to disable?
The notifications are driving me nuts. How to disable?
This should have a one click button to turn off notifications
This should have a one click button to turn off notifications
This Fingerprint canvas blocker does not block most of the websites. For example in Firefox there is a CanvasBlocker extension which blocks canvas fingerprinting on many sites which this extension misses. Further there is no visual indicator when a website is blocked from carrying out Fingerprint blocking.
This Fingerprint canvas blocker does not block most of the websites. For example in Firefox there is a CanvasBlocker extension which blocks canvas fingerprinting on many sites which this extension misses. Further there is no visual indicator when a website is blocked from carrying out Fingerprint blocking.
Is it possible to disable the notifications just for this plugin? I don't want to disable notifications all out for chrome - I just don't want to see them for this
Is it possible to disable the notifications just for this plugin? I don't want to disable notifications all out for chrome - I just don't want to see them for this
Unfortunately it breaks some websites that use the distilnetworks.com services because it blocks the getImageData javascript function. Here's my console log when trying to log into my greenmangaming.com account. https://i.imgur.com/0VMdMfg.png
Works Great! I have been using it for a few months now and no problems. Nice and fast, keep providing future updates to this extension.
Works Great! I have been using it for a few months now and no problems. Nice and fast, keep providing future updates to this extension.
perfect. No popup option, that's great.
perfect. No popup option, that's great.
Всё работает! Оху... Отлично! Спасибо! ***** ! Это пять!
To disable notifications, right-click on one of the notifications, and select "Disable notifications for [...]"
To disable notifications, right-click on one of the notifications, and select "Disable notifications for [...]"
