I noticed that when closing a window from a tab, the focus goes to the next tab who was right before the current tab. Is it possible to have a config option to choose between "select tab next to us" (as it is now) and "select previously focused tab"?

I believe there are "switch to last active tab" keybindings... and if there are not, maybe there should be. It is not that different from "browsing to last focused group"...