Examine source code of Kaomoji

{
  "manifest_version": 3,
  "name": "Каомодзи",
  "browser_specific_settings": {
    "gecko": {
      "id": "elderlyjmih@gmail.com"
    }
  },
  "version": "1.0.0",
  "description": "Твой пак каомодзи",
  "icons": {
    "16": "favicon-16x16.png",
    "32": "favicon-32x32.png"
  },
  "action": {
    "default_popup": "index.html"
  },
  "permissions": [
    "storage"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}