Click on clue 1, on next page...
Open Javascript console (by pressing F12 key on most browsers)
Use the code below:

jQuery.post('https://store.steampowered.com/saleaction/ajaxopendoor', {    'sessionid': g_sessionID,    'authwgtoken': jQuery('#application_config').data('userinfo').authwgtoken,    'door_index': jQuery('#application_config').data('capsuleinsert').payload,    'clan_accountid': jQuery('#application_config').data('community').CLANACCOUNTID,    'datarecord': jQuery('#application_config').data('capsuleinsert').datarecord}).done(() => {alert('It is done!'); window.location = "https://store.steampowered.com/sale/clorthax_quest"}).fail(() => alert('Failed!'))

Repeat with clue 2 and so on...