Called Web Media Extensions (via Aggiornamenti Lumia), the app adds support for additional file formats in Microsoft Edge, as well as Windows 10 as a whole. This negates the need for installing individual codecs to add system-wide support for media formats that Windows 10 doesn't support from the outset.
Available for free, Web Media Extensions includes support for the OFF Container, as well as Vorbis and Theora decoders across the whole system. The Store listing notes that it is available for PC, Xbox One, HoloLens, and Mobile. Any app or program that needs to play the media file formats covered will be able to do so once Web Media Extensions is installed.
In any case, if you have a need to play these open formats on your PC, you can grab Web Media Extensions for free from the Microsoft Store now.
