For deleting cookies as I go, in Slimjet (Chrome) I use Cookie AutoDelete
The info page says that:"During this session, Cookie AutoDelete has deleted 237 cookies and in total 32497 cookies."
It "Auto-deletes unused cookies from your closed tabs while keeping the ones you want." and is apparently based on https://github.com/C...te/Cookie-AutoDelete
I recall that when I used Firefox (before Mozilla destroyed it for me), I had a useful cookie-killer that deleted newly-arrived cookies after a pre-set time interval (10 seconds or so), even if the tab was still open. You could tell it to leave cookies from selected websites alone. The advantage was that those websites that forced you to accept their cookies, or objected if you wouldn't
accept their cookies, were none the wiser when their cookies were subsequently individually deleted, and it kept the place really tidy.