i quit firefox and save tabs. i re-launch the next day. it asks if i want "to restore previous session", which is odd because that's the question you get if a session ends unsuccessfully, and my previous session ended without incident. i click "yes". it restores not my previous session, but a session from last week. it does this every day, restoring not my tabs from the day before, but the same tabs from a particular session last week. it's the same set of tabs every time, tabs that i was finished with last week. this is a fairly new problem, as for years i have successfully closed sessions and saved tabs only to re-open the same tabs the next day without issue. i have not changed any settings prior to this problem. help! and thanks.