Web 2.0 allowed for the enhancement and revamp of web pages’ aesthetics and interaction mechanics. Moreover, current web browsers function almost as a de facto operating system: they run “apps”, along with other background plug-ins. All of which have an increasing energy impact, proportional to the rate of appearance of more sophisticated browser mechanisms and web content. We present the architecture of GreenBrowsing. A system that proposes the provision of (i) a Google Chrome extension to monitor, rationalize and reduce the energy consumption of the browsing experience and (ii) a Certification Scheme for dynamic web pages, based on web-page performance counter statistics and analysis, performed on the cloud.