Safari crisp-edges not supported?

Question

This is driving me absolutely nuts. I'm trying to upscale some pixel art and Safari isn't playing ball. This is the CSS I'm applying to the image:

Sub Group_Formula()
    Dim frmla As String, rw As Long, rws As Long, n As Long, cnt As Long

    frmla = "=SQRT((A$×-A×)^2+(B$×-B×)^2+(B$×-B×)^2)"

    With ActiveSheet '<-set to worksheet name properly!
        For cnt = 1 To Application.CountIf(.Columns("G"), "Full*")
            rw = Application.Max(2, rw)
            rws = Application.Match("Full*", .Cells(rw, "G").Resize(Rows.Count - rw, 1), 0)
            .Cells(rw, "H").Resize(rws, 1).Formula = Replace(frmla, Chr(215), rw)
            rw = rw + rws
        Next cnt
    End With

End Sub

Now this works great in Chrome and looks like this:

But on Safari it renders this blurry mess:

I'm using Safari 8.0 and every thread I've seen says this should be working. It's not. It's simply not. I'm aware there are solutions involving drawing on a canvas but come on.. it's 2015, I shouldn't have to jump through hoops to upscale with the most basic of upscaling algorithms.