Is there a browser with Python?

Question

Python

Good evening!
I read that once there was a mazilla assembly with a built-in python interpreter, but I can’t find anything like that in the search. I am interested in how to implement such functionality:
1) the page is loaded
2) the python accesses the page content, for example, in text format every second
3) an ajax event occurs on the page and a new element appears - a form
4) the python processes the new information and returns it in form
5) everything is repeated
It would be possible to use requests, but on the desired site everything is in ajax and there is no api (((
What are the options for solving such a problem?
Threat
is nothing criminal)

Answer 1

Why is Python necessary, write an add-on in JavaScript, and if it’s purely for automation, then install Selenium, it also supports Python.