I have been thinking about trying to develop a firefox extension that handles cookies kind of the same way as uMatrix handles requests, so I can accept/reject every single cookie separately instead of on doing it for doing it for an entire domain . The thing I miss the most in cookie manager extensions I have tried is the ability to “block” a single cookie on a specific site, so I can browse this site with the cookies I have accepted, and without the blocked ones ever being set again.
Because I can’t find an extension that does this I’m thinking that it maybe doesn’t make sense, or that there are some technical restrictions making this difficult to implement.
So my the things I hope you want to discuss is: Does an extension like this already exist? And do you think it even makes sense to have rules on a single-cookie level, or is it sufficient to have on a domain-level?