Bem-vindo aos extras do Thunderbird.
Adicione funcionalidades e estilos extra para tornar o Thunderbird só seu.
FecharAnálise para o Extra Folder Columns por Henning Spruth
Avaliado com 4 de 5 estrelas
Very useful extension, I don't quite understand why this feature was removed to begin with.
I was able to make it work with the production version of 3.0 by downloading the .xpi file, unzipping it, editing the install.rdf file (change the maxVersion in line 14 to 3.0), creating a new XPI, and installing it. Do this at your own risk, of course.
Para criar as suas próprias coleções, tem de ter uma conta dos extras da Mozilla.