Assegnate 4 su 5 stelle

This extension is very useful, but needs updating to work properly with Thunderbird 38.5 and newer.

The problem: The last opened address book is not remembered between sessions. There has been a bug (https://bugzilla.mozilla.org/show_bug.cgi?id=1142705) with the contacts sidebar not remembering the last opened address book. The bug is solved in TB 38.5.

@developer: Can you please make Address Book Tab remember the last opened address book between sessions? This would be greatly appreciated.