sur la console, le start firefox donne ceci :

ygb@ygEeePC901xubuntu:/media/VerbatimP2ext2/ygb/Bureau$ firefox -ProfileManager

(firefox-bin:3176): GLib-WARNING **: g_set_prgname() called multiple times
Gtk-Message: (for origin information, set GTK_DEBUG): failed to retrieve property `GtkTreeView::odd-row-color' of type `GdkColor' from rc file value "((GString*) 0xb4acddb0)" of type `GString'
ygb@ygEeePC901xubuntu:/media/VerbatimP2ext2/ygb/Bureau$ 


et il s'affiche une boite avec le message suivant :

Firefox cannot use the profile "test-alr-run" because it is in use.
To continue, close the running instance of Firefox or choose a different profile.

Une reprise depuis console après fermeture de la boite profile manager donne ceci, avec le même message de blocage.
ygb@ygEeePC901xubuntu:/media/VerbatimP2ext2/ygb/Bureau$ firefox &
[1] 3217
ygb@ygEeePC901xubuntu:/media/VerbatimP2ext2/ygb/Bureau$ 
(firefox-bin:3226): GLib-WARNING **: g_set_prgname() called multiple times
Gtk-Message: (for origin information, set GTK_DEBUG): failed to retrieve property `GtkTreeView::odd-row-color' of type `GdkColor' from rc file value "((GString*) 0xb4a5adb0)" of type `GString'

la ssortie par controleC donne :
^C
[1]+  Done                    firefox
ygb@ygEeePC901xubuntu:/media/VerbatimP2ext2/ygb/Bureau$ 

Noter qu'un lancement de thunderbird via console semble donner le même incident au début, mais le logiciel se lance tout de même.

ygb@ygEeePC901xubuntu:/media/VerbatimP2ext2/ygb/Bureau$ thunderbird

(thunderbird-bin:3280): GLib-WARNING **: g_set_prgname() called multiple times
Gtk-Message: (for origin information, set GTK_DEBUG): failed to retrieve property `GtkTreeView::odd-row-color' of type `GdkColor' from rc file value "((GString*) 0xb253500)" of type `GString'

** (thunderbird-bin:3280): CRITICAL **: murrine_style_draw_focus: assertion `height >= -1' failed

** (thunderbird-bin:3280): CRITICAL **: murrine_style_draw_focus: assertion `height >= -1' failed
ygb@ygEeePC901xubuntu:/media/VerbatimP2ext2/ygb/Bureau$