Recommendation P.1501 describes subjective testing methods for assessing the user perceived quality for web browsing in browser-based applications of different device classes. It gives guidance on the selection of test environment, equipment and content and how test procedures should be properly planned in order to facilitate realistic web browsing behavior of the subjects. The described methods can be used to identify the impact of several different influence factors on the user perceived quality of web browsing, e.g. identifying the influence of the browsing device on user perceived quality for identical technical access network settings.