Thanks for your message and all the support, bro. I'll do my best to always bring tools that help create better and more fun games. Let's push RPG Maker to its limits!
If you have some time, take a look at this tool:
https://kadajah.itch.io/kadajah-external-popup
It's currently working in fullscreen and it's perfectly possible to run minigames with HTML5 and JS in it in an extremely simple way, with the on/off button that we all love.
Anything you need, just let me know, I'll keep you informed about the development of the arcade plugin.