Rated 4 out of 5 stars

Very useful and fine! It should be part of the standard TB distribution!
I use TB 3.1.2 with the predefined or the "own 2.4.1" theme and many different extensions being relevant - I suppose - "More functions for addressbook".
In this condition I noted two little problems:
1. If I pass the mouse over the "AddressbookTab" button, I don't see any label for it at difference of the Calendar and Task buttons;
2. I have more than one addressbook. If I want to have the addressbook "x" in a tab I can choose it from the list of my AB and I can add it to the tabs.
However if I close TB prg and then I reopen it, the AddressbookTab always substitutes it with the "Personal Addressbook". Moreover, if I open more than one addressbook in different tabs, when I reopen the program, it leaves only the Personal Addressbook open in a tab..
Topoldo

This review is for a previous version of the add-on (1.3.2).