Rated 4 out of 5 stars
This is exactly what I want, but for cookies. Example: When I visit www.google.com it should not read my login from the cookie that was set at YouTube.com. I know that they're the same company, but I would I would LOVE to see this exact same segregation done to cookies.
Also, this plugin specifically looks quite nice. This will become a part of my "must" install on new FF installs.