Reviews for CanvasBlocker
CanvasBlocker by kkapsner
Review by Firefox user 14156124
Rated 5 out of 5
by 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/pFvdgKNN
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/pFvdgKNN
Developer 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.
447 reviews
- Rated 5 out of 5by thevoid, 4 days ago
- Rated 5 out of 5by Сырное, 8 days ago
- Rated 4 out of 5by Firefox user 12814982, 10 days agoAn sich ein wirklich klasse AddOn, was Webseiten definitiv zu schaffen macht.
Leider bremmst es den Browser je nach Seite extrem aus.
Gerade Karten-Webseiten wie z.B. Google Maps sind teilweise unbenutzbar, wenn der CanvasBlocker zuschlägt.
Der Blocker von Firefox selbst, ist hier etwas harmloser, dafür aber auch von der Block-Qualität schlechter. - Rated 5 out of 5by Rinshun, 13 days ago
- Rated 5 out of 5by Firefox user 18642424, 17 days ago
- Rated 1 out of 5by Firefox user 14186837, a month agoMade my rating on EFF's CoverYourTrack tool worse!
- Rated 5 out of 5by Sonya, a month ago
- Rated 5 out of 5by Firefox user 17288647, a month agoThis is a game changer. This security add-on compliments your VPN and enhances the security of your web surfing experience. You should include this as one part of your layered strategy security plan.
- Rated 5 out of 5by josh L., a month ago
- Rated 5 out of 5by t3 ur u4 to c3, a month agoits good but it would be great if right-clicking on the extension also had an option to temporarily disable it for testing purposes
- Rated 5 out of 5by Firefox user 18973328, a month ago
- Rated 4 out of 5by B00T987, a month agoI love this extension! However its a bit hard to use, because you have to uninstall, and reinstall the extension to open up the easy to use settings picker. If you change your settings as often as I do, if not then this is an easy 5/5 extension.
- Rated 1 out of 5by HedgehogInTheCPP, 2 months ago
- Rated 4 out of 5by AnoniM0US3, 2 months agothe addon prevents "youtube comment search" addon from working
is there a way to fix this, without having to turn canvasblocker off each time?
or even better: can i block or unblock each element separately, until i find the culprit? (the way "NoScript" addon visualized this is very beginner userfriendly)
thank you - Rated 5 out of 5by Firefox user 18369793, 2 months ago
- Rated 4 out of 5by Sembler, 2 months ago
- Rated 5 out of 5by Firefox user 15514956, 2 months ago
- Rated 5 out of 5by woam, 2 months ago
- Rated 2 out of 5by Firefox user 18936765, 2 months agoI don't know why I use this as every fingerprint test website tells me I'm unique...out of millions of users.....
- Rated 1 out of 5by Pedro Henrique, 2 months agoThis trash simply breaks any website Captha. Even reducing the preset don't work.
- Rated 5 out of 5by Firefox user 15544790, 3 months ago
- Rated 5 out of 5by Firefox user 18893709, 3 months ago
- Rated 5 out of 5by Firefox user 18882242, 3 months ago
- Rated 5 out of 5by Firefox user 17855064, 3 months ago