~/D/firefox> ls
application.ini           libfreebl3.so*   libxul.so*
browserconfig.properties  libmozjs.so*     modules/
chrome/                   libnspr4.so*     mozilla-xremote-client*
components/               libnss3.so*      old-homepage-default.properties
crashreporter*            libnssckbi.so*   platform.ini
crashreporter.ini         libnssdbm3.so*   plugins/
defaults/                 libplc4.so*      removed-files*
dictionaries/             libplds4.so*     res/
extensions/               libsmime3.so*    run-mozilla.sh*
firefox*                  libsoftokn3.chk  searchplugins/
firefox-bin*              libsoftokn3.so*  updater*
greprefs/                 libsqlite3.so*   updater.ini
icons/                    libssl3.so*      xpicleanup*
libfreebl3.chk            libxpcom.so*
di@wj-laptop ~/D/firefox> ./firefox

(gecko:7772): Gdk-CRITICAL **: gdk_screen_get_display: assertion `GDK_IS_SCREEN (screen)' failed

(gecko:7772): GLib-GObject-WARNING **: invalid (NULL) pointer instance

(gecko:7772): GLib-GObject-CRITICAL **: g_signal_handlers_disconnect_matched: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed

(gecko:7772): GLib-GObject-CRITICAL **: g_object_ref: assertion `G_IS_OBJECT (object)' failed

(gecko:7772): Gdk-CRITICAL **: gdk_screen_get_display: assertion `GDK_IS_SCREEN (screen)' failed

(gecko:7772): GLib-GObject-CRITICAL **: g_object_get_data: assertion `G_IS_OBJECT (object)' failed

(gecko:7772): Gdk-CRITICAL **: gdk_screen_get_display: assertion `GDK_IS_SCREEN (screen)' failed

(gecko:7772): GLib-GObject-CRITICAL **: g_object_get_data: assertion `G_IS_OBJECT (object)' failed

(gecko:7772): Gdk-CRITICAL **: gdk_screen_get_display: assertion `GDK_IS_SCREEN (screen)' failed

(gecko:7772): GLib-GObject-CRITICAL **: g_object_get_data: assertion `G_IS_OBJECT (object)' failed

(gecko:7772): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.14.1/gobject/gsignal.c:2180: invalid unclassed object pointer for value type `GdkScreen'

(gecko:7772): Gdk-CRITICAL **: gdk_screen_get_display: assertion `GDK_IS_SCREEN (screen)' failed

(gecko:7772): GLib-GObject-CRITICAL **: g_object_get_data: assertion `G_IS_OBJECT (object)' failed

(gecko:7772): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.14.1/gobject/gsignal.c:2180: invalid unclassed object pointer for value type `GdkScreen'

(gecko:7772): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed

(gecko:7772): Pango-WARNING **: failed to create cairo scaled font, expect ugly output. the offending font is 'DejaVu Sans 0'

(gecko:7772): Pango-WARNING **: failed to create cairo scaled font, expect ugly output. the offending font is 'DejaVu Sans 0'

(gecko:7772): Pango-WARNING **: shaping failure, expect ugly output. shape-engine='BasicEngineFc', font='DejaVu Sans 0', text='English Hello'

(gecko:7772): Pango-WARNING **: pango_font_get_glyph_extents called with null font argument, expect ugly output