xdg-desktop-portal

A portal frontend service for Flatpak and possibly other desktop
containment frameworks.

xdg-desktop-portal works by exposing a series of D-Bus interfaces known
as portals under a well-known name (org.freedesktop.portal.Desktop) and
object path (/org/freedesktop/portal/desktop).

The portal interfaces include APIs for file access, opening URIs,
printing and others.
