Firejail: 0.9.62
Archlinux (Sway WM)
Default Profile.
If I try to open a new firefox window when there's one already open, I get the "Firefox is already running but is not responding" error.
This only happens when running from inside firejail, and only when using export MOZ_ENABLE_WAYLAND=1 (that is, running firefox with wayland rather than xwayland).
cause: nodbus
I can confirm that removing nodbus fixes the issue
Closing here, as the issue has been adressed.
For the record: dbus-user.own org.mozilla.firefox.*
Most helpful comment
cause:
nodbus