This method has been deprecated. Please pass in the proxy object to the Driver Object about browsermob-proxy-py HOT 2 OPEN

from browsermobproxy import Server
server = Server("path/to/browsermob-proxy")
server.start()
time.sleep(1)
proxy = server.create_proxy()
time.sleep(1)

from selenium import webdriver
proxy_firefox = proxy.proxy
caps = webdriver.DesiredCapabilities.FIREFOX
caps['marionette'] = True
caps['proxy'] = {
    "proxyType": "MANUAL",
    "httpProxy": proxy_firefox,
    "ftpProxy": proxy_firefox,
    "sslProxy": proxy_firefox
}
driver = webdriver.Firefox(capabilities=caps)
...
result = json.dumps(proxy.har.get('log'), ensure_ascii=False)     # proxy.har.get('log')
...
server.stop()
time.sleep(1)
driver.quit()                                                            # закрываем окно браузера
time.sleep(1)