I use a slightly customised version of tree style tabs to great effect. Actually uses the horizontal bar to show pinned / recent tabs (which time out and hide)

I use a slightly customised version of tree style tabs to great effect. Actually uses the horizontal bar to show pinned / recent tabs (which time out and hide) and an overlaid / toggle-hidden sidebar for the full list of group-organised tabs. https://gist.github.com/theprojectsomething/6813b2c27611be03e67c78d936b0f760 https://gist.github.com/theprojectsomething/6813b2c27611be03...