"We use screen capturing software to view and analyse individual customers' usage ....".
Is it technically possible for the business using that software to capture any part of a customer's screen other than the content of the page that is being served? For instance, can the business:
(a) view peripheral information on the customer's browser - e.g. their bookmarks, extensions, tabs open, etc; or
(b) view parts of the customer's screen that are not related to the browser - e.g. a Word document or image to the side of the browser?