How can I get windows displayed as last time? (locked duplicate)

When I restart Firefox, or my PC wakes from sleep, my Firefox windows are all in a different order. Also a number of Firefox windows often just die or don't appear on restarting Firefox. Is there a way to make sure that the Firefox windows appear in the same order and number as before? At the moment I have to close Firefox windows and start them manually loading tabs from bookmarks. I would have thought that there must be a better way but I can't find it. It seems as if Firefox should number the windows and keep a list of tabs open in each window, but this doesn't seem to be the case. What am I missing? Is there a setting I need to change? I'm running Windows 11 Pro