Examine source code of Manfi

{
  "manifest_version": 2,
  "name": "Manfi",
  "description": "Покупки с кэшбэком теперь ещё проще!",
  "default_locale": "en",
  "permissions": [
    "notifications",
    "storage",
    "tabs",
    "cookies",
    "clipboardWrite",
    "https://*.manfi.ru/*",
    "https://*.aliexpress.ru/*",
    "https://*.aliexpress.com/*",
    "https://api.track24.ru/*",
    "https://*.lamoda.ru/*",
    "https://*.lamoda.ua/*"
  ],
  "externally_connectable": {
    "matches": [
      "https://*.aliexpress.ru/*",
      "https://*.aliexpress.com/*"
    ]
  },
  "web_accessible_resources": [
    "js/aliexpress.js"
  ],
  "icons": {
    "128": "icons/128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/event.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Manfi",
    "default_icon": "icons/128.png"
  },
  "version": "0.1.35",
  "content_security_policy": "script-src 'self' ; object-src 'self'"
}