@FearlessJuan @kel @Fogmeister @socketwench We have implemented a "Cookie Crumbler" a while back: https://vivaldi.com/blog/vivaldi-crumbles-cookie-dialogs-raises-privacy/.
As for other improvements regarding Cookie management, you can vote for feature requests (such as this one: https://forum.vivaldi.net/topic/24235/better-cookie-management) or submit your own (if you have some novel ideas): https://help.vivaldi.com/desktop/troubleshoot/request-a-new-feature-in-vivaldi/ 🙂