This is the second time fairly recently after Firefox was closed, and restarted I lost all tabs, perhaps 8! This is even with the Startup option, Open previous windows and tabs selected. I had some important websites on tabs and I lost them and using the history option, I was only to open one website and not the most important. This is VERY poor operation and enough to cause me to want to migrate to a different browser. This needs to be fixed without delay.