It tries to, and does it better than others, but nothing is 100% . consent-o-matic gets rid of a ton of these pop up consent banners and sets them to "off"
> which should imply reject most cookies
It does not, though.
In practice, you'd be using uBlock with the other lists which would block all the trackers anyway, so it would (by not loading what would set those cookies in the first place).