Cycle Last Used Tabs 作者： Nikola Kocić

This extension tries to mimic the ALT+TAB behavior from Windows (or Command+TAB in Mac) to allow to switch between open tabs in a Most Recently Used fashion.
It remembers the order in which you switched tabs (made a tab active) and it updates its records so that you can switch to the recently used ones quickly.

Default Keys:
ALT + X: Quick switch
ALT + Z: Normal switch
ALT + Shift + Z: Normal switch (in opposite direction)

=Quick switch=:
Use for rapid switching to last tab (by pressing once) or to the second to last used tab(by pressing rapidly twice) and so on.

=Normal switch=:
Use when you want to look for a tab recently used but when you would want to go in a slower pace (needing to glimpse for a bit to see if it is the page you need)