Without this manifest, the itms-services call fails.
. Self-signed certificates often fail unless manually trusted in the device settings. Browser Support : Users must open the link in
<a href="itms-services://?action=download-manifest&url=https://example.com/app.plist">Install App</a>
For this action to work successfully, several security and technical conditions must be met:
: The action=download-manifest parameter tells the device to first download a configuration file rather than the app itself.