Terminal output (no tabs open):
$ firefox
[GFX1-]: glxtest: libEGL missing methods
(firefox:22137): Gtk-CRITICAL **: gtk_widget_get_style_context: assertion 'GTK_IS_WIDGET (widget)' failed
(firefox:22137): Gtk-CRITICAL **: gtk_style_context_get_state: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
(firefox:22137): Gtk-CRITICAL **: gtk_style_context_get_property: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_value_unset: assertion 'G_IS_VALUE (value)' failed
(firefox:22137): Gtk-CRITICAL **: gtk_style_context_get_property: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_value_unset: assertion 'G_IS_VALUE (value)' failed
(firefox:22137): Gtk-CRITICAL **: gtk_style_context_get_property: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_value_unset: assertion 'G_IS_VALUE (value)' failed
(firefox:22137): Gtk-CRITICAL **: gtk_style_context_get_property: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_value_unset: assertion 'G_IS_VALUE (value)' failed
(firefox:22137): Gtk-CRITICAL **: gtk_style_context_get_property: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_value_unset: assertion 'G_IS_VALUE (value)' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed
(firefox:22137): Gtk-CRITICAL **: gtk_widget_get_style_context: assertion 'GTK_IS_WIDGET (widget)' failed
(firefox:22137): Gtk-CRITICAL **: gtk_style_context_get_state: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
(firefox:22137): Gtk-CRITICAL **: gtk_style_context_get_background_color: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
(firefox:22137): Gtk-CRITICAL **: gtk_style_context_get_color: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-WARNING **: g_object_get_valist: object class 'GtkSettings' has no property named 'gtk-decoration-layout'
(...)
(firefox:22137): GLib-GObject-CRITICAL **: g_value_unset: assertion 'G_IS_VALUE (value)' failed
(firefox:22137): Gtk-CRITICAL **: gtk_style_context_get_property: assertion 'GTK_IS_STYLE_CONTEXT (context)' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_value_unset: assertion 'G_IS_VALUE (value)' failed
(firefox:22137): Gtk-WARNING **: gtkstylecontext.c widget class `GtkNotebook' has no style property named `has-tab-gap'
(firefox:22137): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_ref: assertion 'object->ref_count > 0' failed
(firefox:22137): GLib-GObject-CRITICAL **: g_object_unref: assertion 'object->ref_count > 0' failed
firefox*** : relocation error: stack smashing detected ***: firefox terminated
/home/crashesimmediately/firefox4/libxul.so: symbol , version GLIBC_2.4 not defined in file libc.so.6 with link time reference
Exiting due to channel error.
Exiting due to channel error.
Exiting due to channel error.
Exiting due to channel error.