Comment 42 for bug 1500282

(In reply to Stefan Seidel from comment #31)
> I don't know, maybe I have to buy and send you a 140dpi and a 150dpi device
> so you can experience what the problem is. At <144dpi we're straining users
> with a web rendering that is far too small to be usable and at >144dpi we're
> just wasting space. Yes, adding a 1.5 step mnakes things a bit better, adding
> stepless scaling would make things infinitely better.

It's hard for us to overstate how horrible things are at the wrong scale. They have to see it to believe it!

In my case Firefox rounded up to 3.0, making everything oversized and broke the layout on many sites. FWIW Chrome sets window.devicePixelRatio of 2.5, consistent with what I set in Ubuntu. Perhaps it's my untrained eyes, but I really can't tell that anything looks worse than they should be. I could only see a marked improvement when I set layout.css.devPixelsPerPx to 2.5

$ gsettings get com.ubuntu.user-interface scale-factor
{'eDP1': 20}

$ gsettings get org.gnome.desktop.interface scaling-factor
uint32 2

$ gsettings get org.gnome.desktop.interface text-scaling-factor
1.25