def fake_agent() -> str:
    """
    The original FAKE_USER_AGENT in config.py:
    'Mozilla/5.0 (Windows NT 6.1; rv:84.0) Gecko/20100101 Firefox/84.0'
    Works with Startpage when nothing else will.

    :return: static user agent string.
    """

    # NOTE that the Firefox ver can be any from firefox_agent()
    return 'Mozilla/5.0 (Windows NT 6.1; rv:84.0) Gecko/20100101 Firefox/84.0'