@anthropy then that might be the same type of data that browsers resend each time on refreshing the page (the one when it often warns you that for the page to be refreshed a certain data needs to be resent to the site). I know that startpage uses that type of data to send your search queries. Probably some other popular examples you can think of. There's probably exist some way to preserve that data between multiple sessions. With some extension maybe?

@anthropy does it behave the same if you put and resume your system from hybernation? From simple sleep?