u'--add-metadata', u'--user-agent', u'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0', u'--add-header', u'Accept:text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8', u'--add-header', u'Accept-Language:en-US,en;q=0.5', u'--...