Reviews for CanvasBlocker
CanvasBlocker by kkapsner
428 reviews
- Rated 1 out of 5by Firefox user 12934307, 7 years agobreaks webpages that require adobe flash on waterfox latest release
Developer response
posted 7 years agoPlease open an issue at https://github.com/kkapsner/CanvasBlocker/issues with all your details and a reproduction scenario. There we can communicate way better. - Rated 3 out of 5by Firefox user 13268901, 7 years agoWhat happened to the fingerprint icon up in the toolbar on android FF? It is now gone so how do I know if CB is functioning correctly?
Developer response
posted 7 years agoThe fingerprint icon should be present if you have notifications enabled and something was faked on the page.
You can check if CB is working on the test pages (e.g. https://canvasblocker.kkapsner.de/test/test.html - the hashes should change on reload).
Please open an issue at https://github.com/kkapsner/CanvasBlocker/issues - there we can discuss better.
This issue is solved in 0.5.5 - Rated 3 out of 5by JxReach, 7 years ago
Developer response
posted 7 years agoTell me what you dislike about the new version. Without this information I cannot improve CB. - Rated 5 out of 5by Firefox user 14242164, 7 years agoGreat stuff. I think this should be a "featured extension" in the pivacy and security category.
- Rated 5 out of 5by Firefox user 14054127, 7 years agoNice, but the toolbar icon changes color sometimes (red/green). What do the different colors mean?
Green = I'm save, red = I'm not protected? And what do I have to do for it to protect me again?Developer response
posted 7 years agoThe color change just indicate that something was faked. It's some sort of notification and nothing to worry about. - Rated 5 out of 5by Detergent, 7 years agoI tested this addon with the Panopticlick test from the EFF, and when I check the 'full results' it shows that the hash values are changed every time I have the addon enabled. So I guess it's basically ruining it for people who use these values to track you.
- Rated 5 out of 5by kondor, 7 years ago
- Rated 5 out of 5by samyueru_beityosef_benmayumi, 7 years ago
- Rated 5 out of 5by Fleet Command, 7 years agoIt is great, but it'd be much better if the Mozilla Add-ons link embedded in it was language-agnostic. Currently, it is to the German version of the site.
Developer response
posted 7 years agoThis issue will be fixed in the next version: https://github.com/kkapsner/CanvasBlocker/issues/219 - Rated 5 out of 5by Firefox user 14201700, 7 years ago
- Rated 5 out of 5by Firefox user 14191840, 7 years ago
- Rated 5 out of 5by pix0wl, 7 years ago
- Rated 5 out of 5by Firefox user 14191652, 7 years agoVery nice works.
But it may not pass detective on test page http://101.37.204.139:8080/uapost.html.when try times test, it may enter an endless loop and Let the browser stop working.Developer response
posted 7 years agoThis page doen't even work when no addon at all is installed... but to discuss this further please open an issue at https://github.com/kkapsner/CanvasBlocker/issues
Communication is much easier there. - Rated 5 out of 5by zhaqenl, 7 years ago
- Rated 5 out of 5by Firefox user 13202285, 7 years ago
- Rated 5 out of 5by The Beard Below My Chin, 7 years agoNice works.
Please note I test the audio fingerprint at https://audiofingerprint.openwpm.com/ and it causes browser slowdown.Developer response
posted 7 years agoI know - this page is not written in a peformant way. You can test the audio fingerprint at http://kkapsner.github.io/CanvasBlocker/test/audioTest.html as well. - Rated 5 out of 5by Firefox user 14156124, 7 years agoNice works.
Please note it does not detect (and block) the code embedded in a url through the
"data:text/html" directive.
I don't know if this method it's exploitable in a web page
example: paste the following code on your navigation bar
(It's a dots wave single pixel plotter, so it uses getImageData and it works even if you block the readout API):
edit: sample code moved to pastebin (sorry, pasting the code here does not works):
https://pastebin.com/pFvdgKNNDeveloper response
posted 7 years agoGood point. I will see if this is exploitable. But please open an issue at https://github.com/kkapsner/CanvasBlocker/issues where we can discuss the implications and findings. Also communication is much easier there. - Rated 5 out of 5by GregDT, 7 years ago
- Rated 3 out of 5by Clemens Ratte-Polle, 7 years agoWhere can i test the success of CanvasBlocker?
Does it make problems with twitter header image upload?
i got probsDeveloper response
posted 7 years agoYou can go to http://kkapsner.github.io/CanvasBlocker/test/test.html and check if the displayed hash changes on every reload.
I know of no problems with twitter. But if you think that it is CB related please open an issue at https://github.com/kkapsner/CanvasBlocker/issues - there we can communicate much better. - Rated 4 out of 5by Jezze, 7 years agoDoesn't make my canvas fingerprint less unique. amiunique.org still tells me that my similarity ratio is below 0.1% which means I have a very unique canvas fingerprint.
Developer response
posted 7 years agoIn the default settings the canvas fingerprint is changed on every page reload (you can test that on http://kkapsner.github.io/CanvasBlocker/test/test.html). Yes - this makes the fingerprint unique but since it is not constant you cannot be tracked.
If you want further information/discussion please open an issue on https://github.com/kkapsner/CanvasBlocker/issues where we can communicate nmuch easier.
PS: similar issue on github: https://github.com/kkapsner/CanvasBlocker/issues/154 - Rated 5 out of 5by Firefox user 13835690, 7 years agoThank you for this extension (and for keeping it opensource). Nowadays it's getting harder and harder to get a sense of real privacy. CanvasBlocker + AdGuard for Windows + Privacy Badger + HTTPS Everywhere + custom user.js helps me feel safer on a growing data collection frenzy.
- Rated 1 out of 5by Mozilla Dev, 7 years ago
Developer response
posted 7 years agoPlease provide a reason why you gave one star. Maybe I can fix the issue or improve CB with your input.