Make sure the Presentation API is no risk for our users
The presentation API allows web content to use external presentation-type displays. It comes with own discovery mechanisms (libmdns) and is supposed to be available on desktop and on mobile in the near future (https://wiki.mozilla.org/WebAPI/PresentationAPI). This is a pretty complex beast and we have to make sure that it poses no risk (be into proxy bypass or fingerinting/tracking) to our users.
To upload designs, you'll need to enable LFS and have admin enable hashed storage. More information