Review for Contact Tabs by xorandor
Rated 5 out of 5 stars
Very useful because of the search by any field feature which is great.
However "Contact Tabs supports all fields of Thunderbird's default address book" is not correct because tab display and edit mode does not include "IRC Nick" field (search engine uses it and it is possible to search by this field).
To create your own collections, you must have a Mozilla Add-ons account.