Hi I am trying to scrape data from WhitePages.com and 411.com however my program is always blocked by both websites after 1 query (sometimes even less). When I browse WhitePages.com manually I still get blocked. However, if I switch my browser (from Firefox to Chrome) I am able to search normally. But switching the user agent on Firefox (to chrome) does not work - I am blocked even when I search manually. Can anyone explain how they know I am not "actually" using Chrome? On 411.com I am blocked starting from the first attempt by Distill Networks - does anyone know how to get around it? P.S I am setting delays and randomizing things but to no avail. Thanks!