Examine source code of XELS Rewards

{
  "name": "XELS Rewards",
  "author": "XELS Rewards",
  "version": "1.0.0",
  "manifest_version": 2,
  "description": "XELS Rewards offsets your carbon footprint, for free, 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": [
      "scripts/background.js"
    ]
  },
  "content_security_policy": "object-src 'self'",
  "permissions": [
    "<all_urls>",
    "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": "XELS Rewards",
    "default_popup": "popup.html"
  },
  "options_page": "options.html"
}