(FILES) This file photo taken on May 17, 2012 shows a Facebook logo seen through the windows of the NASDAQ stock exchange in Times Square in New York. Facebook on August 9, 2016 began letting marketing messages slip past ad-blocking software on desktop computers. The update to the leading social network's advertising platform came with assurances that Facebook understands how annoying ads can be and with enhanced tools for controlling the kinds of ads shown to users. / AFP PHOTO / EMMANUEL DUNANDEMMANUEL DUNAND/AFP/Getty Images
