palemoon-dev/platform/dom/xul/test/398289-resource.xul

<?xml version="1.0"?>

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

<dialog xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
        buttonlabelaccept="OK"
        ondialogaccept="alert('OK');"
        buttonlabelcancel="Cancel"
        ondialogcancel="alert('Cancel');">

  <tabbox id="test" flex="1" persist="selectedIndex">

    <tabs>
      <tab label="One"/>
      <tab label="Two"/>
    </tabs>

    <tabpanels flex="1">

      <vbox flex="1">
        <description>Text for tab ONE</description>
        <description class="text-link"
                     onclick="window.open('https://bugzilla.mozilla.org/show_bug.cgi?id=398289');">(test case for bug 398289)</description>
        <tree>
          <treecols>
            <treecol label="Header" flex="1"/>
          </treecols>
        </tree>
      </vbox>

      <vbox flex="1">
        <description>Text for tab TWO</description>
        <description>(When the document is reloaded, this content gets replaced by the one from the first tab.)</description>
      </vbox>

    </tabpanels>

  </tabbox>

  <box height="1000"/> <!-- Push dialog buttons out of sight so that the animated default button isn't part of the snapshot -->

</dialog>