OSX scaling is implemented such that non-int scaling makes pixel-perfect rendering literally impossible. (Hello moire!)
Windows has pretty perfect handing for non-int scaling, though it's on apps to do the right thing. Modern browsers (including Firefox) handle this great, though other apps may or may not.
Windows has pretty perfect handing for non-int scaling, though it's on apps to do the right thing. Modern browsers (including Firefox) handle this great, though other apps may or may not.