Factorio Forums

From every other menu you go back when pressing escape key.
It used to do also for the mods menu, but some versions ago it stopped working and I have to mouse click on back.
Not a very important bug, but when I like using the keyboard more than my mouse.

It currently works that way by design due to how our menu system handles transitions. It will be re-worked in 0.16 so both operations work the same way but for now that's how it is.