What is Best Way for Mullvad Browser in DispVM

I have Mullvad Browser in AppVM. This leaves me vulnerable to malicious javascript infecting qube even if Mullvad Browser contains no telemetry.

How do I make DispVM with Mullvad Browser to defeat malicious javascript qube infection?

open qube settings in this appvm, in the advanced tab, tick disposable template, there you go dispvm.