Rated 5 out of 5 stars
Very good, should be part of the basic build. I believe the reason some users think it does not work is that the button this add-on creates is blank in some themes (e.g. TT DeepDark). You have to click around in the area where a button should be or hover your cursor around until the "AddressBook in new tab" help box appears. Other than that frustrating bug, this is a solid winner.