palemoon-dev/platform/layout/reftests/forms/textbox/setsize.xul

<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>

<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" xmlns:html="http://www.w3.org/1999/xhtml">

<html:textarea style="width: 200px; height: 200px; margin: 0; resize: none;"/>
<html:div style="position:fixed;top:0;left:0;width:100%;height:100%;"></html:div>
</window>