gecko-dev/layout/ipc/test-ipcbrowser.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"
        width="800" height="800" orient="vertical"
        onload="init()">
  <script src="chrome://global/content/test-ipcbrowser-chrome.js"/>

  <toolbar id="controls">
    <toolbarbutton label="Back"/>
    <toolbarbutton label="Forward"/>
    <textbox onchange="loadURL(this.value)" flex="1"/>
  </toolbar>
  <toolbar>
    <textbox id="scbDx" flex="1" value="0"/>
    <textbox id="scbDy" flex="1" value="100"/>
    <toolbarbutton
       onclick="scrollContentBy(document.getElementById('scbDx').value,
                                document.getElementById('scbDy').value);"
       label="scrollBy"/>
    <textbox id="sctX" flex="1" value="200"/>
    <textbox id="sctY" flex="1" value="300"/>
    <toolbarbutton
       onclick="scrollContentTo(document.getElementById('sctX').value,
                                document.getElementById('sctY').value);"
       label="scrollTo"/>
  </toolbar>
  <toolbar>
    <textbox id="vW" flex="1" value="600"/>
    <textbox id="vH" flex="1" value="400"/>
    <toolbarbutton
       onclick="setContentViewport(document.getElementById('vW').value,
                                   document.getElementById('vH').value);"
       label="setViewport"/>
    <textbox id="dX" flex="1" value="0"/>
    <textbox id="dY" flex="1" value="0"/>
    <textbox id="dW" flex="1" value="600"/>
    <textbox id="dH" flex="1" value="600"/>
    <toolbarbutton
       onclick="setContentDisplayPort(document.getElementById('dX').value,
                                      document.getElementById('dY').value,
                                      document.getElementById('dW').value,
                                      document.getElementById('dH').value);"
       label="setDisplayPort"/>
    <textbox id="xR" flex="1" value="2.0"/>
    <textbox id="yR" flex="1" value="2.0"/>
    <toolbarbutton
       onclick="setContentResolution(document.getElementById('xR').value,
                                     document.getElementById('yR').value);"
       label="setResolution"/>
  </toolbar>
  <toolbar>
    <textbox id="vsbX" flex="1" value="0"/>
    <textbox id="vsbY" flex="1" value="100"/>
    <toolbarbutton
       onclick="scrollViewportBy(document.getElementById('vsbX').value,
                                 document.getElementById('vsbY').value);"
       label="scrollViewportBy"/>
    <textbox id="vstX" flex="1" value="200"/>
    <textbox id="vstY" flex="1" value="300"/>
    <toolbarbutton
       onclick="scrollViewportTo(document.getElementById('vstX').value,
                                 document.getElementById('vstY').value);"
       label="scrollViewportTo"/>
    <textbox id="vsX" flex="1" value="2.0"/>
    <textbox id="vsY" flex="1" value="2.0"/>
    <toolbarbutton
       onclick="setViewportScale(document.getElementById('vsX').value,
                                 document.getElementById('vsY').value);"
       label="setViewportScale"/>
  </toolbar>

  <browser type="content" src="http://www.google.com/" flex="1" id="content"
           remote="true"/>
</window>