I'm a big fan of codefisher and the buttons he supplied for pre Australis, but this one adds nothing to the table. Narrow and small pull-down, no ability to close the tabs, doesn't jump to currently selected tab.
Tab center redux, tab list button enhanced and all tabs helper do a better job

I cannot find a button to place on the tool bar but find that there is a down arrow at the far right of the tab bar which I can use instead.