code: def _init_browser(self):
          
          chrome_options = webdriver.ChromeOptions()
          chrome_options.add_argument('--disable-extensions')
          chrome_options.add_argument('--disable-infobars')
          chrome_options.add_argument('--ignore-certificate-errors')
          chrome_options.add_experimental_option('prefs', {
              'profile.managed_default_content_settings.notifications': 1
          })
  
          browser = webdriver.Chrome(chrome_options=chrome_options)
          browser.set_page_load_timeout(10)
          browser.implicitly_wait(1)
          browser.maximize_window()
          browser.get(settings.HARNESS_URL)
          self._browser = browser
          if not wait_until(lambda: 'Thread' in browser.title, 30):
              self.assertIn('Thread', browser.title)
docs: Open harness web page.
  
          Open a quiet chrome which:
          1. disables extensions,
          2. ignore certificate errors and
          3. always allow notifications.