Page provides methods to interact with a single tab in a Browser], or an [extension background page in Chromium. One [Browser] instance might have multiple [Page] instances.| playwright.dev
BrowserContexts provide a way to operate multiple independent browser sessions.| playwright.dev
XMLHttpRequest (XHR) objects are used to interact with servers. You can retrieve data from a URL without having to do a full page refresh. This enables a Web page to update just part of a page without disrupting what the user is doing.| MDN Web Docs