Selenium: connect through a proxy with a username/password- How?

[yoni keren]

There are lots of this exact same question ,but all of the answers are outdated,for example:

This is an outdated answer from 2016:

https://stackoverflow.com/questions/8885137/selenium-using-python-enter-provide-http-proxy-password-for-firefox/35293222

and another outdated answer from 2017:

https://stackoverflow.com/questions/8885137/selenium-using-python-enter-provide-http-proxy-password-for-firefox/35293222

Anyways, when I'm trying to use a proxy which required a username+password like so:

    from selenium import webdriver

    profile = webdriver.FirefoxProfile()

    profile.set_preference("network.proxy.type", 1)

    profile.set_preference("network.proxy.http", PROXY_HOST)

    profile.set_preference("network.proxy.http_port", PROXY_PORT)

    profile.set_preference("network.proxy.socks_username", USERNAME)

    profile.set_preference("network.proxy.socks_password", PASSWORD)

    profile.set_preference('network.proxy.ssl', PROXY_HOST)

    profile.set_preference('network.proxy.ssl_port', PROXY_PORT)

    

    profile.update_preferences()

    

    # executable_path  = define the path if u don't already have in the PATH system variable. 

    

    driver = webdriver.Firefox(firefox_profile=profile)

    page = driver.get('http://whatismyipaddress.com/')

It doesn't work at all.

What's the cleanest way which is actually working to connect through a proxy (given a username and a password as well) right now?

(Bonus points if you can explain why my code doesnt work-the fact it doesnt work makes no sense to me!)