This isn't working for me on my macbook with the chrome extension. I've added cnn.com, nytimes.com, etc and I can still get to them on chrome with the extension. I've restarted my browser. Or am I misunderstanding that this is possible?
Yes those won't transfer to the chrome extension yet - they'll just apply locally to your phone. For whichever app you added them to, they'll be restricted when that app is restricted, and when you unlock that app via breathing exercise, those sites will become unlocked as well.