Total Cookie Protection is the same as the Tor Browser's first-party isolation sandboxing - third-party cookies can't be used to track you across sites because

Total Cookie Protection is the same as the Tor Browser's first-party isolation sandboxing - third-party cookies can't be used to track you across sites because they're only accessible within the domain they were created on. So you don't have to block 3rd-party cookies anymore, since they'll be sandboxed and unable to be used for tracking.