60 tabs opened in Firefox

I can leave my computer on, just put it on pause for the night. Firefox browser obviously remembers all tabs previously opened, this handy when I want to comeback to something I was reading the day before.

Sometimes I overdo it, like today I had 60 tabs opened: 

Looks like I need to "flush" tabs down, which I did :)

There is a study on "How many tabs do people use?" by Patrick Dubroy.