title: How to debug a non-packed Microsoft Edge extension with Native Messaging Host?
body: <p>Couple days ago MS released the Native Messaging support in the MS Edge.
  I've tried to debug the already working Chrome-based extension which uses Native Messaging Host under MS Edge and it failed with error: "Native Messaging not supported for non-packaged extension".
  There are no documentation about Native Messaging manifest registration (I mean the registry key), the format of the manifest file (everyone knows that NMH manifest for Chrome &amp; Firefox is a little different). When this documentation will be available?
  And how can I debug the unpacked extension with NMH under MS Edge?</p>