Need Help with Triggering Host Application Form Junest (MIME type)

[KevinFan9729]

Hello people,

I've set up Junest and installed Chromium within this environment. On my host system, I have an application configured with a MIME type tied to a custom URL scheme. This application launches successfully from a browser installed on the host when this custom URL is triggered.

However, when I attempt to trigger the same URL from Chromium running inside the Junest environment, it fails to invoke the application on the host. This is kinda within my expectation, as the Junest environment is isolated from the host.

XDG Desktop Portal got me excited as it is intended to allow applications within a sandbox to access external resources. Unfortunately, I am uncertain about how to configure this in the context of Junest to achieve the desired functionality. Can anyone provide some insight or guidance on setting this up, or confirm if it's even possible?