Possible notification in Browser tab
75573
Poll in background for StackExchange™ MultiCollider SuperDropdown™ inbox events and update the titlebar accordingly à la Facebook
156826
Confirm message on browser page close
38081
What events trigger an inbox notification?
15692
Is there a way to detect if a browser window is not currently active?
38781
How can I get a notification when someone else's question is reopened?
64514
Can there be a notification for bounties started on questions you've asked or answered?
115642
Notification that ‘someone might be watching what you browse’
66659
Browser asks for confirmation when submitting a question or answer
11626
How does facebook, gmail send the real time notification?
112828
How to display text in the browser status bar?
12362
Detect a new Android notification
102779
How can I send a custom desktop notification?
56598
Can I move Steam notification popups?
52227
Privilege Notifications
32928
Notify users of possible reviews on toolbar
120365
Display notification whenever app is running or not
70664
Allow me to get notifications for new Meta posts, like mods do