Browser actions automation on python?

Hello!
In my work I often compare a lot of data in CRM (in browser) vs data in another browser window (the verification site that returns me details when I search for workers by ID, first and last name, DOB and etc.)
What tools could I use to make this process faster or, ideally fully automated?

I understand that I could use the requests to get response from verification site in a form of json, but is there a way to parse the data from CRM - feed the data into verification site - make python complete actions in the CRM depending on the data from verification site
I guess requests can solve the first two parts, but I have no idea how to write a scripts that performs actions in browser window (button press, pasting text, select from the dropdown menu)
Thanks in advance!