When I browse WWW sites, sometime I've recieved noisy notification requests. If you want to block these requests on Firefox browser, you can block them as following:
- Open settings
- Open privacy and security
- Open allow setting
- Open Notificagtion setting
- Check "Block new requets asking to allow new notifications"
I've reffered the WWW page as following:
Firefox can now block those annoying notification requests
https://techcrunch.com/2018/03/13/firefox-can-now-block-those-annoying-notification-requests/