Dear Community, I recently updated Firefox on my Gentoo system (Window Manager is Ratpoison). I had a shortcut <Ratpoison escape key>-F to open firefox. Before the update I used to press this combination again and another FF window comes up without any problems. Thus, I had 5-6 running FF windows on a normal working day, each with several tabs in it. Since the update, when I use the same method, no new window appears but after a few seconds the message window comes up saying that the running instance is not responding and that FF could not be started. I know the problem with concurrent access of the profile. But, there was (and should be) the functionality that FF connects to a running instance and opens a new window in it. Unfortunately, I do not know how this works programmatically. I already installed dbus (and yes, I also started the dbus daemon) to ensure that this is not the reason - I usually do not use dbus in my setup. Is there a way to reliably trigger the running instance to open a new window from my window manager? How does this "connection to a running instance" usually works? Why is it not working? What can I do to use it, are there any requirements needed? Thank you very much for your effort to help me out. Kind regards - M4tze