input: 
  def webscraper() -> None:
      """ Use Python Selenium to retrieve data from an online store.
      The webscraper will:
      1. Create a Firefox session.
      2. Navigate to a specified online store URL.
      3. Enter a search keyword (e.g., "shoes").
      4. Submit the search and retrieve the list of products displayed.
      5. Print the text of each product.
      6. Close the browser window.
      Example:
      webscraper()
      """
      from selenium import webdriver
  
      # create a new Firefox session
      driver = webdriver.Firefox()
      driver.implicitly_wait(30)
      driver.maximize_window()
  
      # navigate to the application home page
      driver.get("https://www.example.com/")
  
      # get the search textbox
      search_field = driver.find_element_by_name("q")
      search_field.clear()
  
      # enter search keyword and submit
      search_field.send_keys("shoes")
      search_field.submit()
  
      # get the list of elements which are displayed after the search
      # currently on result page using find_elements_by_class_name
      product_list = driver.find_elements_by_class_name("product")
  
      # iterate through each element and print the text that is
      # name of the product
      for product in product_list:
          print(product.text)
  
      # close the browser window
      driver.quit()
  
output:     # close the browser window
      driver.quit()