My issue with systems like this is that they consume valuable horizontal real estate. Like most people, I use a widescreen monitor. To take full advantage of this, I use a tiling window manager (Xmonad) and typically use two browser windows side-by-side, akin to a full two-page broadsheet newspaper. Putting a tab bar on the side of each window would consume nearly 1/3 of the screen and generally get in the way of the content.
Re:Firefox Test Pilot
by greglindahl on Tuesday May 10, 2016 @05:58PM
(#11671013)
The Tab Center in test flight mostly collapses the side tab bar unless you hover over it.
It solves the problem for me using a combination of auto indentation and auto collapsing of inactive tab trees.