1. Error
$ firefox
(firefox:2673): GConf-WARNING **: Client failed to connect to the D-BUS daemon:
Failed to connect to socket /tmp/dbus-80Eq35bHIz: Connection refused
(firefox:2673): GConf-WARNING **: Client failed to connect to the D-BUS daemon:
Failed to connect to socket /tmp/dbus-Hc5ktVWgCD: Connection refused
(firefox:2673): LIBDBUSMENU-GLIB-WARNING **: Unable to get session bus: Could not connect: Connection refused
(firefox:2673): GConf-WARNING **: Client failed to connect to the D-BUS daemon:
Failed to connect to socket /tmp/dbus-awpAoJ2BYb: Connection refused
Reason: You did not add sudo
2. Error
$ sudo su
root@pc1:/home/user1# firefox
MoTTY X11 proxy: Authorisation not recognised
Failed to connect to Mir: Failed to connect to server socket: No such file or directory
Unable to init server: Broadway display type not supported: localhost:10.0
Error: cannot open display: localhost:10.0
Reason: You should not log in as root user to open
3. The correct opening posture:
$ sudo firefox
