Examine source code of X Blue Badge Blocker

{
  "manifest_version": 3,
  "name": "X BlueBadge Blocker",
  "version": "8.4",
  "description": "スレ主を緑枠で保護し、それ以外の青バッジをブロックします（大文字小文字対応・安全装置付き）",
  "author": "Your Name",
  "browser_specific_settings": {
    "gecko": {
      "id": "x-blue-badge-blocker@yourdomain.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://x.com/*",
        "*://twitter.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}