"The WAVE Firefox toolbar provides a mechanism for running WAVE reports directly within Firefox. Because the toolbar reports runs entirely within your web browser, no information is sent to the WAVE server. This ensures 100% private and secure accessibility reporting. The toolbar can check intranet, password-protected, dynamically generated, or sensitive web pages. Also, because the WAVE toolbar evaluates the rendered version of your page, locally displayed styles and dynamically-generated content from scripts or AJAX can be evaluated."
Accessibility checking.
"The development of the information society and the widespreaddiffusion of information technology give rise to new opportunities for learning. At the same time, they challenge established views and practices regarding how teaching and learning should be organised and carried out. Higher educational institutions have been using the Internet and other digital technologies to develop and distribute education for several years. Yet, until recently, much of the learning materials were locked up behind passwords within proprietary systems, unreachable for outsiders. The open educational resource (OER) movement aims to break down such barriers and to encourage and enable freely sharing content."
Yes - the problems are the same with cloud and on-premise systems i.e poor user attention to security eg weak passwords, no 2 factor authentication, etc.