Thanks to the developers.

I only wish it synced its settings with Firefox Sync

Tested with https://browserleaks.com/canvas and it works perfectly

The best! Notifications can be disabled in the add-on settings (these notifications are still not needed)

Doesn't work. It just doesn't appear to do anything about the uniqueness of canvas fingerprint.

It seems that this doesn't currently work, at least, not on Browserleaks anyway.

Assuming it does what it advertises, but annoyingly, it does not remember setting "Do not display desktop notification on a fingerprint attempt".
On top, the /default/ should be that is is silent, not loud.

I'm sorry to leave such a review, but this extension does not work. Tested on Browserleaks.com and a few other services, and it keeps reporting the same signature instead of a different one each page load. Hope an update is coming soon.