Split tabs but vertically

[Salomon]

Would be lovely to be able to use the split tabs (dev feature) but vertically for vertical monitors.

[Ohmegaware]

The ability to split a vertical screen for a Top/Bottom setup would also be extremely helpful in research setups, and yes, you could use OS setups, where you use multiple windows, but the functionality of having it natively in the browser would be glorious, especially for those of us that are often doing multiple tasks at once.