It&#x27;s actually a very low resoluton image (3x7 by default), stretched using the bilinear filtering provided by the browser.<p>Chrome and Safari produce smooth images. Firefox for Mac produces a mosaic (source each pixel gets a ~10x10 grid, it looks pretty good IMO). Firfox for Android may not do any smoothing.<p>I don&#x27;t think there&#x27;s a way to control how the browser does the filtering.