Examine source code of Audio Tab Navigator

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "version": "1.4.0",
  "description": "__MSG_extDesc__",
  "default_locale": "ja",
  "permissions": [
    "tabs",
    "theme",
    "storage"
  ],
  "action": {
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "cycle-audible-tabs": {
      "suggested_key": {
        "default": "Alt+Shift+A"
      },
      "description": "__MSG_commandCycleAudibleTabs__"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "audio-tab-navigator@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version": "109.0"
    }
  }
}