Google search to identify user-agent used by “ask jeeves crawler”
curl 'http://timesink.be/browsercheck/' -H 'User-Agent: Mozilla/5.0 (compatible; Ask Jeeves/Teoma; +http://about.ask.com/en/docs/about/webmasters.shtml)'

Original writeup (https://md.darknebu.la/4cDzvoArTDCD-hpjSmVTwQ?view#Browsercheck).