In theory. Practically, creating browser & its underlying engine is an arduous task. Later, it is inevitable that Google will use dark patterns like shadow dom

In theory. Practically, creating browser & its underlying engine is an arduous task. Later, it is inevitable that Google will use dark patterns like shadow dom to optimize their website like YouTube etc. And, website owner will force you to use chromium based browser, because of course "This browser works best with Google Chrome".