title: What is the executable_path in Google Colaboratory for geckodriver?
body: <p>I want to use geckodriver in Google Colaboratory with Selenium Python package. Here is what I tried (I'm not an expert in Ubuntu)</p>
  
  <pre><code>!pip install selenium
  !apt-get update 
  !apt install firefox-geckodriver
  from selenium.webdriver.firefox.options import Options as FirefoxOptions
  
  firefox_options = FirefoxOptions()
  firefox_options.add_argument("--headless")
  driver = webdriver.Firefox(executable_path=r'/usr/bin/firefox', options=firefox_options)
  </code></pre>
  
  <p>Here <code>r'/usr/bin/firefox</code> is wrong. I'm confused. What can be the solution? Any help is appreciated.</p>