tab-counter 0.2.4.1-signed.1-signed Requires Restart
by Svetlana Tkachenko
shows the number of tabs in the status-bar
About this Add-on
1) hit the drop-down to see the whole tab list; or otherwise
2) do nothing and see that there are just more than 7-or-whatever-fits-in-screen.
This addon counts the tabs in each window to let you know when there're too many - or just to know that you're a tab fan when the number gets over one hundred. ;-)