Deadly CORS when http://localhost is the origin

Question

I am stuck with this CORS problem, even though I set the server (nginx/node.js) with the appropriate headers.

I can see in Chrome Network pane -> Response Headers:

Answer 1

Quick and dirty Chrome extension fix:

Moesif Orign & CORS Changer

However, Chrome does support cross-origin requests from localhost. Make sure to add a header for Access-Control-Allow-Origin for localhost.