In Chrome browser In Firefox browser Also You can enable the desktop notification on user profile page . If you select allow, then the following details will be display on the user profile page. If you select allow and disabled desktop notification, then the following details will be display. If you select block, then the following details will be display. Once you blocked the Desktop notifications, you can revert back by clicking site informations which is in left side top corner on your browser

In Chrome browser**

In Firefox browser