How to Unsubscribe from Push Notifications
Here is how you can unsubscribe from push notifications:
Here you'll get a list of all websites from which you've enabled notifications and you can choose to deny any particular website from sending you further notifications.
Go to Firefox Preferences -> Content -> On the right hand side of 'Notifications', you'll see the Choose button. Click on it. You can either select a particular site and click 'Remove Site', or click 'Remove All Sites' to disable all websites from sending you notifications.
For unsubscribing from notifications on mobile you need to go to Settings > Site Settings > Notifications. Now select the site you want to unsubscribe from. Under Permissions, click Notifications and change it to 'Block' or 'CLEAR & RESET'. Here are the steps:
2. Now, select Notification Settings,
3. This will open the page for all the websites on which you have subscribed to notifications. Select the website that you would like to unsubscribe from.
4. This should give you the setting to either block the notifications or you can use the option to clear and reset all the settings for that particular website.