Examine source code of PageNote

{
  "manifest_version": 2,
  "name": "PageNote",
  "version": "1.0",
  "description": "Effortlessly add, view, and manage short notes for webpages. Save notes with URLs, search them, and revisit pages with a click, all in a sleek, modern popup.",
  "permissions": [
    "tabs",
    "storage",
    "notifications",
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icon.png"
    }
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{1efd0e65-c429-4450-80e2-f58540ca481f}"
    }
  }
}