While I do not know the Safari-Desktop-implementation right now, I know that
Apple's UTI has a URL type.
See here:
https://developer.apple.com/library/ios/documentation/miscellaneous/Reference/UTIRef/Articles/System-DeclaredUniformTypeIdentifiers.html
It would be interesting to see a stat
The Clipboard API spec has a section on Mandatory Data Types [1]. It
says "The implementation must recognise the native OS clipboard format
description for the following data types", and contains a list of 14
mime types. Most of them have clear purposes, but a few seem arbitrary
to me. Since I have
