Mozilla Connect

In ARC browser, we can do this and it is very useful, specially when you have a wide screen and can split the window into two tabs (the perfect use case for split tabs, actually).See the screenshot.When you select, in the essentials aria, a tab set, ...

There is this one feature that ARC, ZEN and other new browsers have that I find very useful.The sidebar shows ONLY the tabs from a specific space. Then we can swap (usually with a two-finger swipe in the sidebar for example, when using tabs in vertic...