SessionPixeltest_cookieGoogleUsed to check if the user's browser supports cookies.1 dayHTTPeverest_g_v2Adobe IncUsed for targeted ads and to document efficacy of each individual ad.2 yearsHTTPfrFacebookUsed by Facebook to deliver a series of advertisement products such as real time bidding from third party advertisers.3 monthsHTTPtrFacebookUsed by Facebook to deliver a series of advertisement products such as real time bidding from third party advertisers.