Rated 5 out of 5 stars

yazan: m-fr1 tarih: Haz. 15, 2012 · kalıcı bağlantı

Works fine in TB 14Beta, if one will add in userChrome.css :

#msgHeaderView, #msgHeaderViewDeck {
max-height: 450px !important;
}

where max-height should be adjusted to your own requirements!