930713 - Window closed programmatically during shutdown is not recognized as closed by Session Store

Status: NEW

(Firefox :: Session Restore, defect)

Description

[Matthew Gertner]

An extension might want to close a window during shutdown. For example, perhaps it opened a navigator:browser popup that is only relevant for the current session. If it closes the window during shutdown (e.g. in quit-application), it will still be opened by the session store when Firefox is started again. The reason is that the state of the session store is "frozen" during shutdown so that windows closed as part of the normal shutdown process are properly restored.

It would be useful to have an API to remove a window from the session store.

Comment 1

[David Teller [:Yoric] - still alive but not very active]

As you point out, the problem is that we have a race condition: the add-on wants to close a window during shutdown, while session restore wants to record windows during shutdown.

Now, we could add yet another shutdown step specifically for session restore, somewhere after quit-application-granted but before closing all the windows, just for the purpose of session restore.