I am on MacBook Pro Venture 13.4.1, firefox 147.0.1. How do I restore old windows with their tabs? I tried to have only one of my 5 windows (with tabs) opening every time I opened firefox. Always two opened, the second one was always the same and not one I had most recently used. Couldn't find an answer, so I went to settings and turned off "Open previous windows and tabs" and turned off firefox and back on again. Then all my windows were gone! How do I get those 5 windows back?