To use proxies with Selenium in Python, it’s recommended to use Selenium Wire (https://pypi.org/project/selenium-wire/) instead of standard Selenium. Selenium Wire supports proxies with username and password authentication, which standard Selenium does not. Install the required packages by running: 
pip install selenium selenium-wire webdriver-manager
Here’s a Python example for integrating Massive proxies with Selenium Wire: 
from seleniumwire import webdriver
from selenium.webdriver.chrome.service import Service
from webdriver_manager.chrome import ChromeDriverManager
from selenium.webdriver.chrome.options import Options
from selenium.webdriver.common.by import By

def configure_proxy(username, password, address, port):
    proxy_url = f"http://{username}:{password}@{address}:{port}"
    return {"proxy": {"http": proxy_url, "https": proxy_url}}

def initialize_driver(proxy_options):
    chrome_options = Options()
    chrome_options.add_argument("--headless")  # Remove this line to see the browser
    driver = webdriver.Chrome(
        service=Service(ChromeDriverManager().install()),
        seleniumwire_options=proxy_options,
        options=chrome_options,
    )
    return driver

def test_connection(driver, test_url):
    driver.get(test_url)
    return driver.find_element(By.TAG_NAME, "body").text

if __name__ == "__main__":
    PROXY_USERNAME = "<YOUR_PROXY_USERNAME>"
    PROXY_PASSWORD = "<YOUR_PROXY_PASSWORD>"
    PROXY_ADDRESS = "network.joinmassive.com"
    PROXY_PORT = "65534"

    proxy_settings = configure_proxy(
        PROXY_USERNAME, PROXY_PASSWORD, PROXY_ADDRESS, PROXY_PORT
    )
    driver = initialize_driver(proxy_settings)

    try:
        test_url = "https://httpbin.io/ip"
        ip_response = test_connection(driver, test_url)
        print(ip_response)
    finally:
        driver.quit()
If you encounter connection issues while using proxies with Selenium Wire, check the following:
  1. Proxy Credentials: Ensure the username and password are correct.
  2. Proxy Host and Port: Verify you’re using the correct host (network.joinmassive.com) and port (65534).
  3. Proxy URL Format: Confirm the proxy URL starts with http://.