the aliases part i actually like, its the account requirement that bugs me. once you log in to use it you kinda undo the reason you picked the browser. i just run a catch all on my own domain and skip sync completely, less stuff to trust
5 aliases is fine to test with but yeah if replying leaks the real address thats kind of the whole point gone. been using simplelogin for that reason. curious if this ends up tied to a brave account you have to keep logged in