This is a cool idea for an add-on, I use the Multi-Account Containers add on along with Cookie AutoDelete to do basically the same thing for a number of sites: Google, Facebook, twitter, linkedin (rot in hell, linkedin), amazon, etc. I like having my cookies there so I don't have to log in every time, but also don't want to be tracked around the web.<p>This looks like a great way to help people who don't want to fiddle with settings to get the same sort of protection. It'd be nice if Multi-Account Containers had an option to add these sites. I should cut a PR for that, probably :\