It would except the user interface will be stripped so bare you can't actually have more than a dozen or so pages open at once! I know there are many people in the same position as me. They open a lot of tabs. When Google killed off vertical side tabs (which were only ever a hidden option you had to enable manually anyway), they went back to Firefox. And now Firefox is taking the vertical side tabs out in the street and shooting them too.

If Firefox included vertical side tabs and committed to supporting many-tabbed browsing as it went pseudo-Chrome-mode, I imagine many fewer people would be irritated.