True. And when I first saw that Tor browser (i.e. Firefox) offered a vertical tabs mode without the tab title (and only the favicons), I thought it was the stupidest vertical tab UI design possible. But then I decided to try it for a week, and guess what - I appreciated the extra space, and it wasn't as hard identifying the tabs through their favicons as I thought it would be. And if needed you can always drag the vertical tab sidebar to reveal the tab title. (Note though that I am not one of these people who opens 100's of tabs and keeps it open. In fact, I find too many tabs cluttering and distracting and if I need to scroll to find my tabs I start closing the tabs).