Tree Style Tab

This extension provides the ability to use tabs as a "tree." New tabs opened from the current tab are automatically organized as "children" of the current tab. By clicking the arrow displayed in the "parent" tab, you can easily collapse such "branches," so you no longer have to suffer from too many visible tabs. If needed, you can reorganize the tree via drag-and-drop. The behavior of this tab tree resembles your visual browsing history. For example, if you see a search results list for a topic, each search result link will open in a new child tab. New tabs opened from these "child" tabs will appear as descendants of their original tab. You can effortlessly dig deeper without losing track of your browsing—if you want to return to the original search results, simply switch to the "root" tab. Moreover, each tree reflects a set of tabs on a similar theme. Enjoy it as you like! Pro tips: - Press the "F1" key to toggle the TST sidebar. - The "Tree Style Tab" toolbar button can also toggle the sidebar. If unnecessary, you can remove it from the toolbar.

Tree Style Tab is a Firefox browser extension that automatically organizes newly opened tabs into a tree structure as 'child tabs' of the current tab, helping users manage numerous tabs and visualize browsing history.