Examine source code of Pocket Menu

{
  "manifest_version": 3,
  "name": "Pocket Menu",
  "version": "1.0.0",
  "description": "Quickly check if an item exists on SwigMenus",
  "action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "pocketmenu@example.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}