Examine source code of Blue Badge Remover

{
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.4.1",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "default_locale": "ko",
  "permissions": [
    "storage",
    "unlimitedStorage",
    "https://x.com/*",
    "https://api.x.com/*",
    "https://twitter.com/*",
    "https://api.twitter.com/*"
  ],
  "web_accessible_resources": [
    "icons/icon48.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "blue-badge-remover@fotone",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Blue Badge Remover",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://twitter.com/*",
        "https://x.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/content.js"
      ]
    },
    {
      "matches": [
        "https://twitter.com/*",
        "https://x.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/injected.js"
      ],
      "world": "MAIN"
    }
  ]
}