@a1ba @ex Well... it definitely has to be triggering some key presses somehow, cause I don't think yakuake can manipulate Firefox processes. But this is weird... I've been using yakuake for many years now, and I've never experienced something like this. Maybe some kind of conflict with whatever desktop environment you're using, but even that feels like a massive stretch.
It's definitely not the hotkey, because the same happens if I manually reopen it from system tray