Few years ago I had Firefox set to open to home screen every time I clicked Firefox on the task bar, even if Firefox was already open in the background. That worked great for me. Now it only lets you do it after four hours of inactivity or something. Or when you close all tabs, which also got harder to do lately. Then until this morning, actually, I've been keeping a shortcut to Firefox home on the bottom of the the home screen right above Firefox in the taskbar. That worked okay for me, but I'd have preferred it like it used to be. Today clicking that shortcut says "Shortcut isn't available." So I opened Firefox home screen to make another shortcut, but I can't. I just want Firefox to open automatically start on the home screen. Because that works for me. Why does it keep getting harder and harder? And what I can do now to fix it?