python chrome 里面 沙箱是啥？

Question

import time
from selenium import webdriver

from xvfbwrapper import Xvfb

vdisplay = Xvfb()
vdisplay.start()

from selenium.webdriver.chrome.options import Options
chrome_options = Options()
chrome_options.add_argument("--no-sandbox")
chrome_options.add_argument("--disable-setuid-sandbox")

driver = webdriver.Chrome('/usr/local/sbin/chromedriver', chrome_options=chrome_options)  # Optional argument, if not specified will search path.
driver.get('http://www.google.com/xhtml');
time.sleep(5) # Let the user actually see something!
search_box = driver.find_element_by_name('q')
search_box.send_keys('ChromeDriver')
search_box.submit()
time.sleep(5) # Let the user actually see something!
driver.quit()

vdisplay.stop()