MacOS Touch Bar in the Browser

Some Macbook Pro models come with the notorious Touch Bar that Apple quickly abandoned again. After having had such a model for a while now, I have a hard time finding practical use cases for it. One of the reasons why it is not that useful is that apps and the system do not take enough advantage of it.

But then I got an idea that would actually make it useful for me. I wanted to build a browser add-on that allows the native Touch Bar to communicate with websites to let buttons and other Touch Bar controls perform actions on them.