Examine source code of XDM Integration Module

{
  "name": "XDM Integration Module",
  "browser_action": {},
  "manifest_version": 2,
  "version": "1.3",
  "description": "Download files with XDM application",
  "permissions": [
    "downloads",
    "tabs",
    "nativeMessaging",
    "cookies",
    "webRequest",
    "*://*/*"
  ],
  "background": {
    "page": "main.html"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "xdm-integration-module@subhra74.github.io"
    }
  }
}