Autofill information is sensitive and the previewed form data is not available to javascript until the user selects one of the options.
Maybe we can paint the previewed information on top of the canvas, like the autofill select popup itself. This would mean that the previewed data, prior to selecting an option, would not be drawn with effects applied in html-in-canvas. For example, if the form was blurred using a shader, the effect might look like:
