(selfservice:7036): GLib-GObject-WARNING **: specified instance size for type `WebKitWebView' is smaller than the parent type's `GtkContainer' instance size

(selfservice:7036): GLib-GObject-CRITICAL **: g_type_add_interface_static: assertion `G_TYPE_IS_INSTANTIATABLE (instance_type)' failed

(selfservice:7036): GLib-CRITICAL **: g_once_init_leave: assertion `result != 0' failed