“Porn mode” is bad name for the thing because for the typical porn use case the user actually wants the persistent persistent browser state (eg. so that pornhub’s “Recommended for you” shows relevant content) and only wants it to be disconnected from their non-porn online activity.
You can still log into the porn website and watch your recommended videos. But after you close that window, no history of that ever happening is stored on your local machine. No urls, history, or cookies.
