To add another example, WebVR API cleanup was inspired by Microsoft that joined the group working on this API. Edge isn't yet shipping WebVR, but they are helping with the work.
Good example! Though, for the record, WebVR 1.1 is shipping in EdgeHTML 15. Fair to call it a preview, since consumer headsets won't be available until later this month with the Fall Creators Update, at which point end-to-end support will work out of the box.