Tip #820
Sort tabs by relation in the Windows and Tabs Panel for a tree-style view.
If you have a ton of tabs open, viewing them in a tree-style layout allows you to get a hierarchical overview of all your browser windows, Workspaces, Tabs Stacks and Tabs. See the child-parent relation, reorder tabs, collapse/expand groups, and more.
To switch to a tree-style view in the Windows and Tabs Panel:



