Please consider adding an UI element for adding/removing the site from the whitelist without having to manually edit the string in the settings. This UI should appear in the popup menu when the extension icon is clicked. This extension would be much more usable with this.

UPDATE: This is great! As I mentioned on Github, I missed this because I'm not used to paying close attention to the icons in the address bar often since I'm using Tridactyl. I've updated my rating accordingly.

The addon works perfectly. I tested all extensions for blocking canvas and this one definitely does the best job.

Hello, excellent program, for when a version for the Opera browser ??????

It gets the job done.
Didn't even know I need it until a web page started to abuse canvas to shove ads in your face

A must have privacy extension for everyone!

Great stuff. I think this should be a "featured extension" in the pivacy and security category.

Nice, 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?

I 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.

It 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.

You are very hard working person :)

Excellent add-on! Thanks for your hard work!

Very 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.

Nice works.
Please note I test the audio fingerprint at https://audiofingerprint.openwpm.com/ and it causes browser slowdown.

Nice 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

Thank 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.