Unfortunately it is very slow compared to Tree Style Tabs if you have a considerable amount of tabs open (even using extensions like auto-unload, it is very very slow). Hope it gets fixed because I would _love_ a built-in vertical tab feature.
However, past a number of tabs (enough to fill the "tab bar" vertically), it doesn't show thumbnails, maybe that's the difference?
Still using Tree style tabs for their sub tabs feature which helps keeping things organised for me.
Unfortunately it is very slow compared to Tree Style Tabs if you have a considerable amount of tabs open (even using extensions like auto-unload, it is very very slow). Hope it gets fixed because I would _love_ a built-in vertical tab feature.