Right. I'm struggling to understand the need for this. Does this browser provide some seamless access to some free-tier Mulled service? If not then it seems like a marketing difference to the TOR browser, which can be used with a VPN and have the TOR bit switched off.
This page[0] lists the differences from the Tor browser[0]. It has the Tor specific features removed, different default extensions, enabled webRTC, and added Mullvad's DoH resolver.
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about:config