Mozilla prototyped something like that back in 2014 called the "Interest Dashboard". The extension is no longer supported however. http://www.ghacks.net/2014/1

Mozilla prototyped something like that back in 2014 called the "Interest Dashboard". The extension is no longer supported however. http://www.ghacks.net/2014/11/14/firefoxs-interest-dashboard-provides-you-with-internet-interest-information/ http://www.ghacks.net/2014/11/14/firefoxs-interest-dashboard...