.Ben Bout commented
Opera, Chrome, Safari and Firefox support APNG. Now the wait is for Edge to support it as well.
Service Worker was turned on by default in Edge included in Windows 10 Insider Preview Build 17063.
See http://blogs.windows.com/msedgedev/2015/07/14/bringing-componentization-to-the-web-an-overview-of-web-components/ (part 1) and https://blogs.windows.com/msedgedev/2015/07/15/microsoft-edge-and-web-components/ (part 2) for more information on our Web Components thoughts, plans, and roadmap.
The OGG container format and the Vorbis and Theora codecs are included in the Windows Media Extensions package. This is included by default in in Windows 10 Insider Preview Build 17063.
mix-blend-mode has been added to our backlog – https://dev.modern.ie/platform/status/mixblendmode/
The CSS will-change property is now on the Microsoft Edge backlog. You can follow status updates at https://dev.modern.ie/platform/status/csswillchange