input: Write a function to create a web scraper using Python's Selenium that retrieves data from an online store. The function should open a Firefox session, navigate to the application home page, perform a search for 'shoes', and print the names of the products returned by the search. The web driver should quit after completing the task.
  
  assert create_web_scraper("https://www.example.com/", "shoes")==None
output: def create_web_scraper(url, search_term):
      from selenium import webdriver
      from selenium.webdriver.common.by import By
      from selenium.webdriver.common.keys import Keys
      import time
  
      driver = webdriver.Firefox()
      driver.get(url)
      search_box = driver.find_element(By.NAME, "q")
      search_box.send_keys(search_term)
      search_box.send_keys(Keys.RETURN)
      time.sleep(2)
      product_names = driver.find_elements(By.CLASS_NAME, "product-name")
      for name in product_names:
          print(name.text)
      driver.quit()