Bugzilla

Update the investigation,
If we just close the tab, the mechanism works correctly.
However, if the tab is closed by window.close(), we cannot finish the final TabState update.
BrowserParent don't receive the IPC call(SendSessionStoreUpdate) from BrowserChild.
https://searchfox.org/mozilla-central/rev/8a990595ce6d5ed07ace2d4d5d86cc69aec90bde/dom/ipc/BrowserChild.cpp#3823

Update the investigation,
If we just close the tab, the mechanism works correctly.
However, if the tab is closed by window.close(), we cannot finish the final TabState update.

Update the investigation,
If we just close the tab, the mechanism works correctly.
However, if the tab is closed by window.close(), we cannot finish the final TabState update.
The reason is we cannot get xulBrowserWindow at this time.
https://searchfox.org/mozilla-central/rev/11712bd3ce7454923e5931fa92eaf9c01ef35a0a/dom/ipc/BrowserParent.cpp#2638