That's effectively what Incognito does, except not at that granularity to make it simpler for users to understand. It probably can't be every site being separa

That's effectively what Incognito does, except not at that granularity to make it simpler for users to understand. It probably can't be every site being separate since that breaks a number of things sites do (like opening 3p windows to complete transactions), but it could probably be done in some kind of logical group manner. Maybe by using different window colors to signify the partitions.