zlacker

>>ray__+(OP)
What's up with all the Arc clones? Did people really like the 3-tier tab sidebar thing that much?

>>idle_z+p3
Zen (Firefox-based) has been really refreshing. You could probably accomplish the same thing with some user scripts and user CSS, but the concern with those has always been that they could break at any time with a new update. That shouldn't happen with a fork like Zen as they have control over updates.

>>chryso+e7
Does it do anything that Sidebery doesn't?

>>orbita+C7
An integrated experience. In the past I found that the vertical tab options in Firefox had the tabs duplicated across the side and the top, which I always found to be a subpar experience. Again, probably something you could accomplish with user.js and user.css but there's a good chance an update could break your modifications.

>>chryso+68
If you haven't tried firefox' vertical tabs recently, try it again. Firefox's default vertical tabs UI is quite nice now.