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https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/notifications/clear
notifications.clear() - Mozilla | MDN
Clears a notification, given its ID.
clear mozilla mdnnotifications
https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/storage/StorageArea/clear
StorageArea.clear() - Mozilla | MDN
Removes all items from the storage area.
clear mozilla mdnstoragearea
https://developer.mozilla.org/de/docs/Mozilla/Add-ons/WebExtensions/API/alarms/clear
alarms.clear() - Mozilla | MDN
Hebt einen Alarm auf, basierend auf seinem Namen.
clear mozilla mdnalarms