Comment 58 for bug 151162

https://bugzilla.mozilla.org/attachment.cgi?id=374754&action=diff#a/widget/src/gtk2/nsDragService.cpp_sec4

I may not read this correct but does this section make the transfer rely on the text/x-moz-url?

As a request to roc, I would think since a file transfer, like doing this attachment, will never create a shortcut url then this should not depend on it. So we should set it up where only the application/x-moz-file-promise-xx types are needed.