Thanks. So it appears that most of it is separated, with the exception of web history and search and form data (which can be identifying). This was also interes

Thanks. So it appears that most of it is separated, with the exception of web history and search and form data (which can be identifying). This was also interesting: "Users can log into multiple accounts on the same site, even when the site does not natively support concurrent sessions. ... Current solutions: Users open multiple browsers (this takes users away from Firefox). A user opens one account in Private Browsing mode (this has a limit of 2 accounts, and forces one to be ephemeral)." There is no mention here of the -no-remote flag which has been available for many years.