TST Fade Old Tabs is a Firefox extension designed to improve tab management by fading out tabs that haven't been accessed for a certain period. This personalization tool categorizes open tabs into three groups based on their last accessed time: 'recent', 'older', and 'oldest'. Each group is visually distinguished by varying opacity levels, making it easier for users to focus on the tabs they use most frequently while minimizing distractions from less relevant tabs.

To utilize TST Fade Old Tabs, users must have the TreeStyleTabs extension installed, as it enhances the functionality of this addon. This subscription-based tool is particularly useful for individuals who manage multiple tabs and seek a cleaner, more organized browsing experience. With its straightforward approach, it helps users maintain efficient workflow and productivity.