<?xml version="1.0"?> <?xml-stylesheet href="chrome://global/skin/" type="text/css"?> <window title="Negative flex bug #2" orient="horizontal" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <button label="Button" flex="1073741824"/> <label value="This is a label" flex="1073741824"/> <label value="This is the second label" flex="1073741824"/> <label value="This is another label" style="-moz-box-flex: 1073741824;"/> </window>