title: Unable to call a custom URL scheme on MacOS
body: <p>I am creating a PowerPoint Office-Js addin solution that depends on a native MacOS app running on the same system, which can be launched using a <a href="https://developer.apple.com/documentation/uikit/inter-process_communication/allowing_apps_and_websites_to_link_to_your_content/defining_a_custom_url_scheme_for_your_app" rel="nofollow noreferrer">custom URL scheme</a> (e.g. MyApp://doSpecificAction).</p>
  
  <p>When I try to open that URL in a browser on MacOs, I get a confirmation prompt then the native app opens successfully. When I try to open the same URL from within the add-in, it doesn't work. Are there certain permissions that I need, and how to do that?</p>