When I use the keyboard for certain Firefox functions, and when I do it fast, time and time again something unintentional happens. When I try to do it slowly, everything’s fine. So there must be some timing issue, or an additional key I press, without me noticing it.
Is there a tool which logs the last 20 (or so) keys I pressed? It also has to show which keys were hold down and before which key press they were released.
As soon as it happens again, I’ll stop typing and check the log to learn which keys I pressed in which order.
It has to be a free/libre tool for GNU/Linux.