I've sort of switched: mobile is FF; desktop is Chrome. The thing that still gets me with both is that memory usage is -insane- and I cannot figure out why it

I've sort of switched: mobile is FF; desktop is Chrome. The thing that still gets me with both is that memory usage is -insane- and I cannot figure out why it is so high. After a few days of usage I'll close all but one tab and will have a 4+GB process. Thank you to FF for maintaining AdBlocking but memory usage needs love, too.