class Capybara::Selenium::MarionetteNode

def disabled?
  # Not sure exactly what version of FF fixed the below issue, but it is definitely fixed in 61+
  return super unless browser_version < 61.0
  return true if super
  # workaround for selenium-webdriver/geckodriver reporting elements as enabled when they are nested in disabling elements
  if %w[option optgroup].include? tag_name
    find_xpath('parent::*[self::optgroup or self::select]')[0].disabled?
  else
    !find_xpath('parent::fieldset[@disabled] | ancestor::*[not(self::legend) or preceding-sibling::legend][parent::fieldset[@disabled]]').empty?
  end
end