Web MIDI API
The Web MIDI API specification defines a means for web developers to enumerate, manipulate and access MIDI devices
Custom protocol handling
Method of allowing a webpage to handle a given protocol using `navigator.registerProtocolHandler`. This allows certain URLs to be opened by a given web application, for example `mailto:` addresses can be opened by a webmail client.
WebM video format
Multimedia format designed to provide a royalty-free, high-quality open video compression format for use with HTML5 video. WebM supports the video codec VP8 and VP9.
web app manifest