Examine source code of kokey — wrong-layout text fixer

{
  "manifest_version": 3,
  "name": "kokey — wrong-layout text fixer",
  "version": "0.7.0",
  "description": "Fix text typed with the wrong keyboard layout — 한글, русский, עברית, ไทย ↔ QWERTY. Right-click or Alt+K. Everything runs locally.",
  "permissions": [
    "contextMenus",
    "storage"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": false
  },
  "background": {
    "service_worker": "background.js",
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "kokey.global.js",
        "settings.js",
        "convert.js",
        "content.js",
        "theme.js",
        "suggest.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "commands": {
    "kokey-fix": {
      "suggested_key": {
        "default": "Alt+K"
      },
      "description": "Fix the focused field or selection / 포커스된 필드·선택 텍스트 복원"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "kokey@devslab.kr",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}