Examine source code of Notendario

{
  "manifest_version": 3,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "version": "1.0.7",
  "icons": {
    "16": "icon-16.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "action": {
    "default_popup": "index.html",
    "default_icon": {
      "16": "icon-16.png",
      "48": "icon-48.png"
    }
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://api.notendario.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "notendario@notendario.com",
      "strict_min_version": "140.0"
    }
  },
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  }
}