Examine source code of Calendar View Mode

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "version": "1.0.0",
  "description": "__MSG_extensionDescription__",
  "action": {
    "default_popup": "popup/popup.html"
  },
  "icons": {
    "128": "icons/icon-128.png"
  },
  "permissions": [
    "storage",
    "notifications",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b9e5a5c2-5d9e-5d0e-7f3c-3b0f28dfd7cd}",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}