Add-ons
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CategoryManager 6.4
troch John Bieling, kxxt
Category manager for Thunderbird contacts, also allows to send an email to all members of a category (categories can be used as contact groups).
Oer dizze add-on
This add-on scans all contact of the users address books, extracts all categories and displays them in an hierarchical list inside the CategoryManager popup window. It provides category management functionalities and allows to use categories as contact groups.
