I'd like to have two "tabs" open in one window, but with the content of the two displayed pages simultaneously visible like this:
================== | content of 1 | | content of 1 | ------------------- | content of 2 | | content of 2 | ===================
I don't want the toolbar and location bar atop each content area, but I could tolerate this.
The difference between this arrangement and just two Safari windows opened one atop the other is that if I resize the single containing window, the panes resize in lockstep with it.
By the way, it would be even better still if I could have these groups of panes within a tab, and tab between such groups (again, like vi(m) tabs/splits).
This doesn't seem remotely possible with basic Safari, but maybe a plugin enables it?