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Display notification whenever app is running or not
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How can I stop Gnome Shell's drive pop up notifications?
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How can I eliminate duplicate notifications when I have a custom notification on a Gmail label?
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How does facebook, gmail send the real time notification?
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Show iPhone notifications when new questions arrive in a subscribed filter
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Receiving Stack Overflow's Chat Notification
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Annoying Viber notification
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Android Scheduled Notifications
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Notification that ‘someone might be watching what you browse’
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Prominent Notification Areas in a Desktop Application
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What is the point of stacking favorite notifications?