Examine source code of Flash Land

{
  "manifest_version": 3,
  "name": "Flash Land",
  "version": "1.2",
  "description": "Flash Land with property auction badges",
  "browser_specific_settings": {
    "gecko": {
      "id": "flashland@guestvis.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "websiteActivity"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  },
  "action": {
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "https://guestvis.com/*",
    "https://asset.led.go.th/*",
    "https://landsmaps.dol.go.th/*",
    "http://*/*",
    "https://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://asset.led.go.th/newbidreg/default.asp*",
        "https://asset.led.go.th/newbidreg/asset_open.asp*",
        "https://landsmaps.dol.go.th/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://asset.led.go.th/newbidreg/default.asp*"
      ],
      "js": [
        "asset-badge.js"
      ],
      "css": [
        "badge.css"
      ],
      "run_at": "document_idle"
    },
    {
      "matches": [
        "https://landsmaps.dol.go.th/*"
      ],
      "js": [
        "landsmaps-badge.js"
      ],
      "css": [
        "badge.css"
      ],
      "run_at": "document_idle"
    }
  ]
}