firefox - ff 插件执行菜单项

Question

为了简单起见，我想修改现有的插件。我有这个代码：

<popup id="contentAreaContextMenu">
<menu id="llOpenLocalLink" label="&llOpenLocalLink.label;" insertbefore="context-sep-open" >

 <menupopup>
  <menuitem id="llOpenInThisTab" label="&llOpenInThisTab.label;" oncommand="LocalLink.openLinkInThisTab(event)"/>
  <menuitem id="llOpenInNewTab" label="&llOpenInNewTab.label;" oncommand="LocalLink.openLinkInNewTab(event)"/>
  <menuitem id="llOpenInNewWindow" label="&llOpenInNewWindow.label;" oncommand="LocalLink.openLinkInNewWindow(event)"/>
 </menupopup>

</menu>
</popup>

而且我只想要一个菜单​​条目，如果单击它就会执行。我试过了，但没有执行：

<popup id="contentAreaContextMenu">
<menu id="llOpenLocalLink" label="&llOpenLocalLink.label;" insertbefore="context-  sep-open" oncommand="LocalLink.openLinkInNewTab(event)">
</menu>
</popup>

好的。我找到了答案：

<popup id="contentAreaContextMenu">
  <menuitem id="llOpenLocalLink" label="&llOpenLocalLink.label;" insertbefore="context-sep-open" oncommand="LocalLink.openLinkInNewTab(event)"/>
</popup>