I'd like to know where does Safari store all the open tabs. My daughter did who-knows-what on my laptop and all tabs were closed (except hers of course...) and the "Reopen from last session" is greyed.
I know that when I update Safari, or even upgrade the OS, the open tabs are kept. I then suppose they are stored in a file somewhere on the HD. As I do have TimeMachine active, I hope that by restoring an older version of this file, I would be able to retrieve my open tabs. The problem being of course that I don't know where it stores them...
I'm on Safari 13.0.2 on macOS 10.13.6 (High Sierra - can't upgrade my early 2011 MBP, but I don't think it would have changed something)