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. 

[Makoto]

Split View with top-bottom splitting

Currently, Split View only supports side-by-side splitting; I would like the option to switch to a top-and-bottom split as well.

[Jon]

(Note: similar ideas have been merged into this thread)

[lrbailey58]

I was just about to post about this and this post appeared. If I'm splitscreening firefox with another application, I want my firefox split tabs to appear vertically!