A "Restart Browser" Button in the file dropdown menu right above the "Exit" button that would save and close every tab and window and restore then on restart.
I don't know if this idea has already been suggested or not and I'm way too tired to check. Either this idea will get implemented or it will get ignored. Or a whole bunch of trolls will come out of the woodwork to condemn me for daring to suggest something that's already been suggested and turned down, i don't care. Implement it or don't.