http://selenium-python.readthedocs.io/installation.html

so we installed python 2.7 for windows using the official package, then opened cmd.exe (with start) and used the FULLPATH to run pip to install selenium, ie:
    
    
C:\Python27\Scripts\pip.exe install selenium

(changing 36 to 27)

the scraper
https://gitlab.constantvzw.org/diversions/differentorders/blob/master/scrape_branly.py

installing the firefox driver
https://github.com/mozilla/geckodriver/releases

oops firefox clicking didn't work (...)

installing the chrome driver
https://chromedriver.storage.googleapis.com/index.html?path=2.25/