class Selenium::WebDriver::Firefox::Marionette::Driver

def create_capabilities(opts)
  caps = opts.delete(:desired_capabilities) { Remote::W3C::Capabilities.firefox }
  options = opts.delete(:options) { Options.new }
  firefox_options = opts.delete(:firefox_options)
  if firefox_options
    WebDriver.logger.deprecate ':firefox_options', 'Selenium::WebDriver::Firefox::Options'
    firefox_options.each do |key, value|
      options.add_option(key, value)
    end
  end
  profile = opts.delete(:profile)
  if profile
    WebDriver.logger.deprecate ':profile', 'Selenium::WebDriver::Firefox::Options#profile='
    options.profile = profile
  end
  options = options.as_json
  caps.merge!(options) unless options.empty?
  caps
end