alt+z (To switch between the two most recent tabs) Navigation error

[hewson99]

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When I quickly switch tab pages，Then when alt+z is pressed, the appropriate page is not navigated

example: open a number of tab， start with the first, press ctrl+e repeatedly，and finally press alt + z

[fwextensions]

Let's say you have 5 tabs, and visit them in order: 1, 2, 3, 4, 5. You're currently on tab 5, and then you press ctrl-E 3 times, so you end up on tab 2. Then you immediately press alt-Z. Which tab do you expect to go to?