Default block cookies?

[sjtex100]

Is there any way in SlimJet (hidden settings?) to default block all cookies and prompt to allow - similar to the way the older version of Firefox used to work? I've tried an bunch of cookie-killing extensions and none of them seem to work as advertised, or the UI is so horrible you can't easily manage cookie settings. Just looking for a way to selectively allow the very few cookies I want to accept.

Thanks.

[dev]

settings then click advanced then to privacy and security then to content settings then cookies

[sjtex100]

I get how to manually add sites to the block and allow lists, but doing it manually after the fact is far from efficient. Just trying to find a way to make that decision when a site loads - a simple popup that says "hey, domain x wants to set a cookie - yes, no, or session only" would be ideal. That's how the older versions of Firefox did it.