I am desperate. I often used to restore last session once my laptop wake up next day in order to save time. I regularly exited FF by top-right GUI cross which had opened 10 sessions that time(no hanging up,crash,simple ordinal FF exit). Then I rebooted OS win7. My FF is latest one 21.0.so hopefully all older bugs shall be solved. Then I started FF with hope that my restore last session tab works from home view.It never happened. I had just blank FF starting page. I checked history manually in LAST MONTH. Almost 20 days back is missing. Then I started deeper investigation in places.sqlite and I opened this by text editor searching raw strings with URLs which I used during last month. THEY GONE,DISSAPEARED from places.sqlite.Just some of them from begging of last month are there. It is really annoying I relied on this FF feature. Can anybody explain me what to do to avoid history lose in next time? I do know that my history gone forever, simple history URLs disappeared from places.sqlite. Restore does not make sense then.No journal file of places. Thanks for any hints.