Face debug mode does not work

I have this entry in web.xml

<context-param>
        <param-name>facelets.DEVELOPMENT</param-name>
        <param-value>true</param-value>
</context-param>

I tried Ctrl + Shift + D to open debug mode, but it didn’t work, and bookmarks for my browser open.

So put off page level debugging.

<ui:debug hotkey="z" rendered="true" />

Debugging results now open in another window, but do not load information about the component tree (cloud variables are displayed).