Examine source code of Remote Work Calendar

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "2.0.1",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "@teleworking-days"
    }
  },
  "description": "__MSG_extensionDescription__",
  "permissions": [
    "storage"
  ],
  "icons": {
    "48": "icons/logo-48.png",
    "96": "icons/logo-96.png"
  },
  "browser_action": {
    "default_icon": "icons/logo-48.png",
    "default_title": "__MSG_extensionName__",
    "default_popup": "popup/telework.html",
    "theme_icons": [
      {
        "light": "icons/logo_dark.svg",
        "dark": "icons/logo.svg",
        "size": 32
      }
    ]
  }
}