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

The solution is to install an extension that lifts the block that Chrome does, for example:

Access Control-Allow-Origin - Unblock (https://add0n.com/access-control.html?version=0.1.5&type=install).