ON CHROME:
To turn off browser notifications in Chrome, go to settings: chrome://settings/content/notifications and "block" Product Hunt.
ON SAFARI: To turn off browser notifications in Safari, click "Safari" in the menu bar at the top of the screen, then "Preferences", "Notifications" and then "deny" Product Hunt access to Notifications.
ON ANDROID:
To turn off notifications on Android, follow the instructions in the photo below: