<?xml version="1.0"?> <window id="sliderprint" title="Print These Sliders" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" style="background-color: white"> <label> With the Classic theme, printing causes the browser to crash. adding style="-moz-appearance: none" to the thumb prevents the crash. The crash doesn't happen at all with Modern. </label> <spacer height="10"/> <hbox> <slider style="height: 174px; width: 24px" orient="vertical"> <thumb/> </slider> </hbox> </window>