A must have for a widescreen Rated 5 out of 5 stars

Love this.
I don't know where I can make a feature request but the only thing I would change would be the ability to put the scroll bar on the right of the column. But usually, if the scroll bar appears, I use it as a hint to close some tabs!

Thanks for the immediate feedback. Solution duly implemented! :-)

This review is for a previous version of the add-on (0.14.2012021101). 

Go to "about:config" and turn the preference "extensions.treestyletab.tabbar.invertScrollbar" to "false", then you'll see the scrollbar on the right even if you put the sidebar on the left.