So on Chrome, I usually had split multiple windows on multiple monitors. When I finished for the day I'd close them and when I got back I'd open them (via restore session on Chrome) and all of my windows with all of their tabs would properly open. On firefox only 1 window opens and it is making me lose a lot of saved tabs and information I need. It has been almost a deal breaker for me, even tho I enjoy Mozilla more than Chrome, this is such an important feature. Linux Ubuntu, Mozilla (idk which one, the most basic one)