OK

This used to be a great extension, but it no longer works. Cookies from sites that are not on my whitelist are not being deleted. They remain after I restart Firefox and even after manually clicking the “clean” button.

Abandoned Extension; no updates in over a year and a half. Very hard to sync across devices if you use Container Tabs. Doesn't seem to be compatible with recent Firefox cookie changes; I found dozens of unexpected cookies which were not autodeleted.

No longer works, save your time. Unfortunately there is no way to 'Automatically delete unwanted cookies from your closed tabs while keeping the ones you want' as there are no controls or drop down menus available. Extension last updated 2 years ago.