After release of new UI I tried a compact view with vertical tabs. But having compact tabs on the left or right is not practical. I like minimalism and usually have less than 10 tabs open at a time. So, it make a lot of sense to just make address bar narow (like 50% or even 35%) and place tabs icons to the right from it. It will save a lot of space and utilise most of screen space for web-sites.
P.S. By the way, in compact view rounded corners of menus not dicrease their radius so highlighted first and last menu items look odd.