Examine source code of Site Notes

{
  "manifest_version": 3,
  "name": "Site Notes",
  "description": "Take notes that show up for a specific website",
  "version": "2.0.2",
  "browser_specific_settings": {
    "gecko": {
      "id": "sitenotes@scoutcorpsllc.com"
    }
  },
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon.png"
  },
  "action": {
    "default_icon": "icons/icon.png",
    "default_popup": "popup/popup.html"
  },
  "sidebar_action": {
    "default_icon": "icons/icon.png",
    "default_title": "Site Notes",
    "default_panel": "sidebar/sidebar.html",
    "browser_style": false
  },
  "permissions": [
    "storage",
    "tabs",
    "webRequest"
  ],
  "host_permissions": [
    "https://site-notes.azurewebsites.net/*"
  ]
}