How to set proxy authentication (user & password) using Python + Selenium

Question

I am using Firefox WebDriver in Python 2.7 with Selenium. My python program starts Firefox browser and visits different websites when I run the program. But, I need to set t

Answer 1

In an addition to the answer with extension.

You can also use form filling to dynamically change credentials on your proxy. Just load the extension page, fill the form automatically and click save!