http://www.rfc-editor.org/rfc/rfc6694.txt
RFC 6694: The "about" URI Scheme, S. Moonesamy2012-08-01T23:00:00-00:00This document describes the "about" URI scheme, which is widely used by Web browsers and some other applications to designate access to their internal resources, such as settings, application information, hidden built-in functionality, and so on. This document is not an Internet Standards Track specification; it is published for informational purposes.