I use a laptop. When I can, I hook-up a large monitor to be my primary view, and the laptop monitor becomes the secondary/extension screen. For some reason, Firefox constantly opens a new window on my laptop screen instead of on the large monitor in front of me. It didn't do this when I started using Firefox. But—perhaps because I moved the window to my laptop screen at one time—new windows now only open on the laptop screen. I've tried quitting Firefox with one window on the large screen, hoping that starting Firefox next time would open on the last monitor used, but that doesn't work. What do I have to do so new windows default to the large monitor?