3 points
YouTube for one, and if you were to place two windows side by side you’d loose a lot of space on duplicate tab bars.
0 points
Not sure what you’re actually losing on YouTube though… You go fullscreen quickly anyway. And if I put two windows side by side I just disable the tab because I’m likely doing it for a reason to have two specific pages on them, actually giving more screenspace because I don’t have the bar at the top either.