arthropode's questions

I am trying to configure my openbox's menu.xml, and I would like to define a menu entry which launch a maximize application, for example firefox.

<menu id="root-menu" label="OpenBox 3">
    <item label="firefox">
        <action name="Execute">
            <execute>firefox</execute>
        </action>
        <action name="Maximize" />
    </item>
</menu>

But it doesn't work. After some test, I think that only the first action is execute.

Someone have a solution ?