When closing the last tab with "Close window with last tab" turned off, the last tab disappears abruptly and in the tab count, it briefly flashes as there being 0 tabs.
Usually, when the last tab is closed it transitions to the start page tab without any flashing in the tab count.
Version 1.0.0 (139), WebKit 623.1.8.0.0
Tahoe (26)
