This has been happening with increasing frequency for months, most recently twice this week; overnight, all my tabs on firefox mobile for ios will disappear. They aren't in the 'recently closed', I have triple-checked that I turned the inactive tabs setting OFF (and they aren't there), I just wake up and all my tabs are gone. Unlike others whose tabs vanish, it doesn't seem to be related to the app updating, it just happens randomly with no warning. Firefox is the best web browser for me, but this is making me consider switching back to safari for mobile because I cannot stand this. I really want to continue being able to use firefox for mobile. Please, can anyone help me figure out where my tabs are going and why?