A very good extension that works, but you have to thoroughly configure it first.
This add-on rightfully deserves a solid four stars.

Improvement suggestions:

1. A wildcard (*) Greylist expression makes the [+Greylist ] button redundant, so this button should be hidden whenever the * Greylist expression exists.

2. Would be really nice to have this extension combined with the "I don't care about cookies".
so single extension would handle both roles.

This is a great extension, and needs little more to be rated full five stars. Thanks.

Nice Extension

I loved Self Destructing Cookies. Thanks for creating and updating this!

Does its job. Has whitelist, greylist and blacklist, allows sites to be added on-the-fly.

Thanks for cleanup and speed help

convient

EXCELLENT replacement for Self Destruction Cookies.

Lots of options. Does everything it should and nothing it should not. Plenty of configuration options.

Thank you Kenny Do.

Perfekter Ersatz für den von mir sehr geschätzten Cookieculler.

Improved my internet experience! Combined with Firefox Container tabs it is sooo good!

Good self-destructing-cookies replacement for Firefox 57+.

AFAICS it reliably auto-deletes all the cookies of a site after its last tab is closed.

Some Cookies will not be deleted. But usually it works!

Good

Hallelujah, it works (and perfectly). I had struggled for years on trying to retain the cookies I wanted and delete the rest. This add-on makes it simple.

I have used many cookie "managers" over the years and this is IMO the best of those available for Firefox.
Import/export whitelists and hundreds of cookies deleted at a go. Good stuff here. I would like a bit more larity on how 3rd party are handled. I need to read all the information, I guess :-)
You should give it a try. If I feel the same in 6 months I will donate - as everyone should.
Thanks, Kenny and keep up the good work.

installieren und vergessen; funktioniert ohne weitere Einstellungen schon sehr gut und wenn man doch noch dran drehen will, ist es kinderleicht; es gibt 'ne white-/blacklist, so dass man jederzeit frei entscheiden kann welche cookies man behält und welche nicht;

Einfach und intuitiv zu bedienen, und es tut genau, was es soll.

Very handy. Just gotta watch which cookies it's deleting... if you find yourself having to log into a site when you close the tab & return to that said site, your deletion prefs won't stay saved or anything like that, check the deletion logs to make sure the cookies aren't being deleted by this extension. Easy to white list any important cookies... & if you get lost, they provide instructions for the asking. :) This is cross-browser, so it can be used on other browsers too. :) Just awesome... :D