socket.error: [Errno 54] Connection reset by peer Selenium-python

I am new to selenium and trying an exampler http://www.marinamele.com/selenium-tutorial-web-scraping-with-selenium-and-python">here

import time
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC
from selenium.common.exceptions import TimeoutException


def init_driver():
    driver = webdriver.Firefox()
    driver.wait = WebDriverWait(driver, 5)
    return driver


def lookup(driver, query):
    driver.get("http://www.google.com")
    try:
        box = driver.wait.until(EC.presence_of_element_located(
            (By.NAME, "q")))
        button = driver.wait.until(EC.element_to_be_clickable(
            (By.NAME, "btnK")))
        box.send_keys(query)
        button.click()
    except TimeoutException:
        print("Box or Button not found in google.com")


if __name__ == "__main__":
    driver = init_driver()
    lookup(driver, "Selenium")
    time.sleep(5)
    driver.quit()

I have installed selenium using

pip install selenium

But Its not working.

Error showing up is

socket.error: [Errno 54] Connection reset by peer

and sometimes

raise BadStatusLine(line)
httplib.BadStatusLine: ''

Firefox open up and then shuts down saying "Firefox has quit unexpectedly"

I have gone through Selenium headless browser webdriver [Errno 104] Connection reset by peer and Why am I getting this error in python ? (httplib) but nothing helped.