from selenium import webdriver
from selenium.common.exceptions import NoSuchElementException
from selenium.webdriver.common.keys import Keys
import time
profile = webdriver.FirefoxProfile()
profile.set_preference('network.proxy.type', 1)
profile.set_preference("network.proxy.socks","socks_ip")
profile.set_preference("network.proxy.socks_port","socks_port")
profile.update_preferences()
browser = webdriver.Firefox(profile) # Get local session of firefox
browser.get("http://www.domain.com") # Load page
browser.close()