Examine source code of Simple Notes

{
  "manifest_version": 3,
  "name": "Simple Notepad",
  "version": "1.1",
  "description": "A minimal notepad extension.",
  "icons": {
    "32": "icon/icon.ico",
    "48": "icon/icon.ico",
    "64": "icon/icon.ico",
    "128": "icon/icon.ico"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "32": "icon/icon.ico",
      "48": "icon/icon.ico",
      "64": "icon/icon.ico",
      "128": "icon/icon.ico"
    }
  },
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hayden@haydenbeckett.co.uk"
    }
  }
}