Are 3 rd parties slowing down the mobile web

Content Providers (CPs) such as Facebook, Google, and others desire that their websites attract large user bases and generate high revenue. As a result, CPs strive to develop attractive and interactive websites that keep users engaged. JavaScript libraries from Online Social Networks, advertisements, and user tracking beacons allow CPs to personalize webpages based on end-users' interests, while various CSS frameworks make websites aesthetically pleasing [7, 9]. Further, webpage analytic APIs and performance monitoring tools allow CPs to monitor the user-perceived performance with their websites [8, 11]. However, as CPs continue to evolve their websites with more and more attractive features the webpage load time (PLT) starts to increase, which results in poor user experience with their websites [5, 12, 27].