Please add an independent search bar just for searching tabs at the top of vertical tabs as in the add-on, Tab Center Redux. It's so fast and efficient! As you type, it instantly filters your tabs to show only those that match your search text and hides those that do not.
Before anyone says it, yes–I am aware that you can type "%" in the search bar to search tabs you have open. But this bar is faster for quickly filtering tabs you have open in your current group–especially when you have a gazillion tabs open and need to find one without scrolling for ten minutes or stop audio in a tab you can't find.