A great deal of work and the result is brilliant.
Lot's of work because we all know the challenge there is to balance two opposite conditions in order to achieve an aim.
The aim here is to bypass the annoyment of sites askiing for cookie consent.
The opposite conditions are stated in the extension's about :

"In most cases, the add-on just blocks or hides cookie related pop-ups. When it's needed for the website to work properly, it will automatically accept the cookie policy for you (sometimes it will accept all and sometimes only necessary cookie categories, depending on what's easier to do). It doesn't delete cookies."

There are sites where a cookie acceptation is required otherwise you just won't make it.
Try for instance opening YouTube without a prior cookie consent : impossible; you'll be redirected to YouTube's consent page.
In this example the extension will create a cookie stating your consent : there is no alternative.
For those of us barking because considering accepting is a defeat, please think twice : there are sites (as YouTube, as others) which just won't let you enter without an explicit consent : that's where the extension pops in and relieves us from the constraint.
From there on, use a cookie cleaner such as 'Cookie Autodelete' if you wish to clean a site's cookies on exit.

Again, thanks to the developer for this fantastic work.