[SyneRyder]

Microsoft Edge Beta has this. In Settings -> Site Permissions, you can disable "Allow sites to save cookies", but then add individual websites to the Allow list. There is also a Clear On Exit list you can add sites to.

I'm pretty sure Firefox & Chrome have similar functionality.

[fitzroy]

Thanks, just found it here in Chrome: chrome://settings/content/cookies

I've mostly switched back to Safari ...so I look forward to getting this option in a decade or so.

In all seriousness, this would naturally fit into the new Safari "Websites" permissions in Settings. Right now cookies, databases, HSTS policy, and local storage are still in the old "Manage Website Data..." window, which would seem redundant now.