Selenium

Python + Chrome

HTTP Proxy

from selenium import webdriver
from selenium.webdriver.chrome.options import Options

PROXY = "connect.trueproxies.com:8080"

chrome_options = Options()
chrome_options.add_argument(f"--proxy-server=http://{PROXY}")

driver = webdriver.Chrome(options=chrome_options)
driver.get("https://httpbin.org/ip")
print(driver.page_source)
driver.quit()

With Auth Extension

import zipfile
from selenium import webdriver
from selenium.webdriver.chrome.options import Options

PROXY_HOST = "connect.trueproxies.com"
PROXY_PORT = 8080
PROXY_USER = "your_username"
PROXY_PASS = "your_password"

manifest_json = """{"version":"1.0.0","manifest_version":2,"name":"Proxy","permissions":["proxy","tabs","unlimitedStorage","storage","<all_urls>","webRequest","webRequestBlocking"],"background":{"scripts":["background.js"]}}"""

background_js = """var config = {mode:"fixed_servers",rules:{singleProxy:{scheme:"http",host:"%s",port:parseInt(%s)},bypassList:["localhost"]}};chrome.proxy.settings.set({value:config,scope:"regular"},function(){});function callbackFn(details){return{authCredentials:{username:"%s",password:"%s"}};}chrome.webRequest.onAuthRequired.addListener(callbackFn,{urls:["<all_urls>"]},["blocking"]);""" % (PROXY_HOST, PROXY_PORT, PROXY_USER, PROXY_PASS)

pluginfile = "proxy_auth_plugin.zip"
with zipfile.ZipFile(pluginfile, "w") as zp:
    zp.writestr("manifest.json", manifest_json)
    zp.writestr("background.js", background_js)

chrome_options = Options()
chrome_options.add_extension(pluginfile)

driver = webdriver.Chrome(options=chrome_options)
driver.get("https://httpbin.org/ip")
print(driver.page_source)
driver.quit()

Python + Firefox

from selenium import webdriver
from selenium.webdriver.firefox.options import Options

PROXY_HOST = "connect.trueproxies.com"
PROXY_PORT = 8080

options = Options()
options.set_preference("network.proxy.type", 1)
options.set_preference("network.proxy.http", PROXY_HOST)
options.set_preference("network.proxy.http_port", PROXY_PORT)
options.set_preference("network.proxy.ssl", PROXY_HOST)
options.set_preference("network.proxy.ssl_port", PROXY_PORT)

driver = webdriver.Firefox(options=options)
driver.get("https://httpbin.org/ip")
print(driver.page_source)
driver.quit()

Country Targeting

Use the username parameter:

PROXY_USER = "your_username-country-us"