There's nothing like that built in, but it's an interesting idea.

Possibly there is an add-on that could do it? I don't know whether add-ons can add exceptions.

Hello, I'm just curious. How would one go about suggesting this as a feature. I think all you need to do is maybe add a "remove and add to exception block list" button as an additional option. Also is there something about the way the window displaying the cookies is defined that disables my ability to cut and paste. If I could cut and then paste the name of the cookie I want to block in the exception list it would make life a little easier. thks again, gord

Mozilla created a new "ideas" site recently at:

https://mozilla.crowdicity.com/