Rated 5 out of 5 stars

m-fr1 কর্তৃক জুন 15, 2012 তারিখে · permalink

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!