Rated 3 out of 5 stars
Since the recent update, the tabs are no more in the titlebar and can not find any way to hide the titlebar. same problem as reported by "nunoleite".
I love this addon, please fix it!!!!
About the title bar, see the FAQ: http://piro.sakura.ne.jp/latest/blosxom/mozilla/extension/treestyletab/2014-05-06_draw-in-titlebar.htm