Examine source code of Etihad Guest Reward Card

{
  "manifest_version": 2,
  "name": "Etihad Guest Reward Card",
  "version": "4.0.3resigned1",
  "description": "Use your Etihad Guest Miles for online shopping. Load or view your Etihad Guest Visa Reward Card at the checkout without leaving the page!",
  "author": "PointsPay",
  "applications": {
    "gecko": {
      "id": "pointspay@loylogic.com"
    }
  },
  "icons": {
    "16": "img/Icon16.png",
    "48": "img/Icon48.png",
    "128": "img/Icon128.png"
  },
  "background": {
    "page": "html/background.html"
  },
  "browser_action": {
    "default_title": "Pay with Etihad Guest Miles worldwide",
    "default_icon": "img/Icon19.png",
    "default_popup": "html/popup.html"
  },
  "web_accessible_resources": [
    "/img/close_button.png"
  ],
  "permissions": [
    "webRequest",
    "activeTab",
    "clipboardRead",
    "clipboardWrite",
    "notifications",
    "geolocation",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/content-script.js"
      ]
    }
  ]
}