It breaks websites.
The idea is good, however it seems like it plainly hides the cookie warnings instead of accepting them.
This results in websites that are unusable. You click elements that don't react, you try to scroll but it won't work, etc. You refresh maybe thinking maybe something didn't load correctly, but nothing you do will fix the website, but disabling this addon and accepting the cookie notification.
It caused great frustration initially when I had no idea why can't use a website.
Edit:
@Kiko
Turns out I didn't even have the latest version because for some reason the minimum version is now 57. So in browser updates won't work on v56 that I use.
Edit2:
Now I reported them.

Does what it says on the tin, super useful and works great!

Eine echte Erleichterung! Funktioniert bei den meisten Seiten. (Keine Ahnung, wer die blöde Idee mit den Cookies hatte) Danke dafür!

causes problems with many websites (onlyoffice.eu, mytf1.fr).
I know I can add exception, but finding which FF plugin is involved is a pain.

Thanks.That "accept cookie" thing is worse then ads

Een essentiële extensie die je heel veel clicks bespaart.

It works pretty good, but requests too big permissions like access to logins and passwords among many other. Can not find the link to open source platform like Github.

An incredibly useful extension that finally makes browsing the Web a delightful experience. Just don't forget to block those evil tracking cookies in Firefox!

A utiliser conjointement avec l'option de suppression automatiques des cookies a la fermeture de FF, sinon, trop dangereux de tout accepter.