Not OP, but personally I'm using Tab Center Reborn with a bit of custom browser CSS to make it slide out on hover (so there are only favicons visible until hovered). It's just a vertical UI for tabs with handy filtering entry box, rather than a complex tab management thing like TST. The only thing I'm missing is filtering/jumping to the tabs that play sounds - it's easy to miss a tiny icon when you have thousands of tabs open :P