Horizontal space is somewhat of a premium though, especially if things like reader mode or buttons provided by addons as available in the current Firefox will r

Horizontal space is somewhat of a premium though, especially if things like reader mode or buttons provided by addons as available in the current Firefox will return to the URL bar once more. And the current design for Fenix doesn't help in that regard by having quite a bit more white space - the tab counter and menu button take up approx. 50 % more width than they do in the current Firefox.