Same issue for me on mac/brave. I have noticed brave has some new restrictive security settings. I also had problems connecting to ws://localhost relays with it.
Discussion
Thanks! My bad, the surface of stuff I had to test these couple days was huge, Brave didn't make it to the list 😂
Maybe it’s time to ditch brave
Brave disables push api by default, you can enable by going to brave://settings/privacy and enabling "Use Google services for push messaging" https://github.com/firebase/firebase-js-sdk/issues/3195#issuecomment-848036637
Ditching brave