I have recently went from Firefox on Windows 7 to Firefox on Windows 10.
I find that the space taken up by the above toolbars is 1 inch more that before
and that is after applying the before:config density fix.. This is stupid, why would
anyone want to use up that much space.. Window7, 1.75inch and Windows 10 ,2.75 inches.
To me this is not smart, you should give more control over this for the user.