Is that so? That's awful, theoretically websites shouldn't store any until you actually agree, maybe except the "necessary" ones.

Anyways, I'd advise to use I still don't care about cookies instead if you really want to use the extension, as the original has been acquired by Avast, of all companies.
For an extension that is more refined in how it handles the cookie pop ups there's Consent O Matic, but in my experience it covers fewer websites so you're either fine with that or contribute by reporting unsupported websites.
There's also the uBlock Origin option, it has a filter list for cookie pop ups that should pretty much work like the first extension