Ok, I was using Waterfox before, and then opened some pages I think that is pretty important, then closed the browser and borrowed the computer to the others. But the others have also used Waterfox I think, because I can‘t restore previous session，There are too many tabs, although there is history but it is almost impossible to retrieve by.these tabs are really important, please tell me if there is any rescue.Some contents are only shown in the case of restore previous session