from selenium import webdriver

firefox_profile = webdriver.FirefoxProfile('C:/Users/Семья/AppData/Roaming/Mozilla/Firefox/Profiles/a0h5hppu.default-1524421021997')

firefox_profile.add_extension(extension='C:/Users/Семья/AppData/Roaming/Mozilla/Firefox/Profiles/a0h5hppu.default-1524421021997/extensions/{6102b8dc-1dcb-4f98-ae5c-1240d815ca92}.xpi')

firefox_profile.set_preference("browser.privatebrowsing.autostart", True)

driver = webdriver.Firefox(firefox_profile=firefox_profile)