Gdjs extension `gdjs._extension` to be used in action call (SOLVED)

How do I...?
1

There is private object model like so at the event of onFirstSceneLoaded
I go ahead and define like so:

//Define an new private object javascript for the screen control pad extension
gdjs._extensionMyGreatGlobalDevice = {
    gg: {
        tposX:0,
        tposY:0,
        imageHalf:0,
        active:false,
        object: false
    }
}

How I got to develop an action on the extension to serve as non-behavior call.
Why there is nothing to show in the gdjs._extensionMyGreatGlobalDevice when I call the function in beginning of the scene once event?

2

It should work properly unless they are being disabled. Check again.