Examine source code of Greening The Earth Rewards

{
  "name": "Greening The Earth Rewards",
  "author": "Mark Siadat",
  "version": "1.3.4",
  "manifest_version": 2,
  "description": "Greening TheEarth Rewards offsets your carbon footprint, and saves you money with automatic discount codes when you shop online.",
  "icons": {
    "16": "icons/on/on_16x16.png",
    "32": "icons/on/on_32x32.png",
    "48": "icons/on/on_48x48.png",
    "128": "icons/on/on_128x128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_security_policy": "object-src 'self'",
  "permissions": [
    "http://*/",
    "https://*/",
    "tabs",
    "cookies",
    "alarms",
    "webRequest"
  ],
  "web_accessible_resources": [
    "*"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icons/off/off_16x16.png",
      "32": "icons/off/off_32x32.png",
      "48": "icons/off/off_48x48.png",
      "128": "icons/off/off_128x128.png"
    },
    "default_title": "Greening The Earth Rewards",
    "default_popup": "popup.html"
  },
  "options_page": "options.html",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "{734c8e5b-c690-4a0a-8cea-93f77155b2ca}"
    }
  }
}