Examine source code of WowApp Cashback Assistant

{
  "manifest_version": 2,
  "name": "WowApp Shopping Cashback Assistant",
  "description": "The WowApp Shopping Cashback Assistant helps you earn cashback from online shopping.",
  "version": "1.2.1",
  "applications": {
    "gecko": {
      "strict_min_version": "59.0"
    }
  },
  "icons": {
    "16": "/data/img/icon-16.png",
    "32": "/data/img/icon-32.png",
    "64": "/data/img/icon-64.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "cookies",
    "alarms",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": {
      "16": "/data/img/icon-grey-16.png",
      "32": "/data/img/icon-grey-32.png",
      "64": "/data/img/icon-grey-64.png"
    }
  },
  "options_ui": {
    "page": "/data/options.html"
  },
  "content_scripts": [
    {
      "js": [
        "/data/js/document-messages.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end",
      "match_about_blank": false
    },
    {
      "run_at": "document_start",
      "js": [
        "/data/js/jquery.js",
        "/data/js/shop.js"
      ],
      "css": [
        "/data/css/shop.css"
      ],
      "matches": [
        "<all_urls>"
      ],
      "match_about_blank": false
    }
  ],
  "background": {
    "scripts": [
      "/data/js/jquery.js",
      "/data/js/background.js"
    ]
  },
  "web_accessible_resources": [
    "data/css/*.*",
    "data/img/*.*",
    "data/js/jquery.js",
    "data/js/shop.js",
    "data/js/document-messages.js"
  ]
}