Either a black screen saying that website could not load (I'll update this submission with a screenshot and correct message later) or by never finishing to load the website.
Reproduce (Win11, MASQ 0.9.6):
  1. Browse to https://haven.xx.network/
  2. Type in password of your choice and click on Continue.
This chat app will not load past the password login stage.
It loads fine while MASQ network is disconnected (not consuming).