Examine source code of Dates & Days Calculator

{
  "manifest_version": 3,
  "name": "Dates & Days Calculator",
  "version": "1.0",
  "description": "Calculate the duration between two dates or find the date by adding/subtracting days, with an optional weekday-only mode.",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_icon": "icons/icon16.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "datesndayscalc@vaibhav.buildstech",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}