Examine source code of ZIK booster

{
  "background": {
    "scripts": [
      "js/background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "19": "img/logo16.png",
      "38": "img/logo48.png"
    },
    "default_popup": "res/settings.html",
    "default_title": "ZIK booster"
  },
  "content_scripts": [
    {
      "css": [
        "res/flags16.css",
        "res/cust.css"
      ],
      "js": [
        "js/jquery-3.2.1.min.js",
        "js/index.js"
      ],
      "matches": [
        "*://*.zikanalytics.com/*",
        "*://zikanalytics.com/*"
      ],
      "run_at": "document_end"
    }
  ],
  "content_security_policy": "script-src 'self' ; object-src 'self'",
  "description": "ZIK Booster is a free Firefox Extension that helps ZIK users check the competition level of items and avoid listing VeRO products.",
  "icons": {
    "16": "img/logo16.png",
    "32": "img/logo32.png",
    "48": "img/logo48.png",
    "64": "img/logo64.png"
  },
  "manifest_version": 2,
  "name": "ZIK booster",
  "permissions": [
    "storage",
    "*://*.zikanalytics.com/*",
    "*://eBay.com/*",
    "*://ebay.co.uk/*",
    "*://ebay.de/*",
    "*://amazon.com/*",
    "*://amazon.co.uk/*",
    "*://amazon.de/*",
    "*://walmart.com/*",
    "*://aliexpress.com/*",
    "*://zikanalytics.com/*",
    "*://dealextreme.com/*",
    "*://newegg.com/*",
    "*://banggood.com/*",
    "*://www.zikcoin.co/*",
    "contextMenus",
    "activeTab",
    "tabs"
  ],
  "version": "0.4.32",
  "web_accessible_resources": [
    "*.png",
    "*.PNG",
    "res/*",
    "*.css",
    "/js/inject.js"
  ]
}