Comment 26 for bug 201487

For what it's worth, when the DPI goes from 191dpi to 192dpi, the expected result is that we change our CSS pixel scaling factor from 1 to 2, so that a CSS pixel becomes 2 device pixels instead of one. This may be relevant because our default font size is 16 CSS pixels, and images by default are given a size based on their intrinsic dimensions, in CSS pixels. I'm guessing that's what you're complaining about, but you haven't actually said anything about the symptoms you're seeing other than "looks awful".