Cycle Last Used Tabs is a Firefox extension designed to enhance tab navigation by mimicking the ALT+TAB functionality found in Windows. This tool allows users to switch between open tabs in a Most Recently Used (MRU) manner, streamlining the browsing experience. It intelligently tracks the order in which tabs were activated, enabling quick access to recently used tabs.

The extension offers several keyboard shortcuts for efficient tab switching: ALT + X for quick switches, ALT + Z for normal switching, and ALT + Shift + Z for reverse normal switching. The quick switch feature allows users to rapidly navigate to the last or second-to-last tab, while the normal switch provides a more leisurely approach, perfect for users who wish to take a moment to identify the desired page.