When you click om ‘Block’ on the push notification opt-in that shows on a website, you will not receive their notifications. Here’s how you can unblock notifications from a website and start receiving them :

For Firefox : 

  1. Go to the URL from where you want to unblock notifications. Click on the Chat box symbol and then click on the ‘x’ button next to ‘Blocked’ against ‘Receive Notifications’ and reload the page.
  1. You will now see a pop up with the opt-in for notifications. Click on ‘Allow Notifications’ and you will start receiving future notifications from this website.