Firefox 3.5 en 64 bits

Hola Me instale el firefox 3.5 mediante ubuntuzilla y no puedo navegar. Esto es lo que obtengo cuando pongo sudo firefox desde consola.
Alguna ayudita? Tengo ubuntu 64b 9.04 (jaunty)

Gtk-Message: Failed to load module "canberra-gtk-module": /usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so: clase ELF errónea: ELFCLASS64
/usr/lib/gio/modules/libgvfsdbus.so: clase ELF errónea: ELFCLASS64
Failed to load module: /usr/lib/gio/modules/libgvfsdbus.so
/usr/lib/gio/modules/libgiogconf.so: clase ELF errónea: ELFCLASS64
Failed to load module: /usr/lib/gio/modules/libgiogconf.so
/usr/lib/gio/modules/libgioremote-volume-monitor.so: clase ELF errónea: ELFCLASS64
Failed to load module: /usr/lib/gio/modules/libgioremote-volume-monitor.so
LoadPlugin: failed to initialize shared library /usr/lib/xulrunner-addons/plugins/libunixprintplugin.so [/usr/lib/xulrunner-addons/plugins/libunixprintplugin.so: clase ELF errónea: ELFCLASS64]
LoadPlugin: failed to initialize shared library /usr/lib/totem/gstreamer/libtotem-cone-plugin.so [/usr/lib/totem/gstreamer/libtotem-cone-plugin.so: clase ELF errónea: ELFCLASS64]
LoadPlugin: failed to initialize shared library /usr/lib/totem/gstreamer/libtotem-gmp-plugin.so [/usr/lib/totem/gstreamer/libtotem-gmp-plugin.so: clase ELF errónea: ELFCLASS64]
LoadPlugin: failed to initialize shared library /usr/lib/totem/gstreamer/libtotem-mully-plugin.so [/usr/lib/totem/gstreamer/libtotem-mully-plugin.so: clase ELF errónea: ELFCLASS64]
LoadPlugin: failed to initialize shared library /usr/lib/totem/gstreamer/libtotem-narrowspace-plugin.so [/usr/lib/totem/gstreamer/libtotem-narrowspace-plugin.so: clase ELF errónea: ELFCLASS64]
LoadPlugin: failed to initialize shared library /usr/lib/xulrunner-addons/plugins/librhythmbox-itms-detection-plugin.so [/usr/lib/xulrunner-addons/plugins/librhythmbox-itms-detection-plugin.so: clase ELF errónea: ELFCLASS64]
LoadPlugin: failed to initialize shared library /usr/lib/swfdec-mozilla/libswfdecmozilla.so [/usr/lib/swfdec-mozilla/libswfdecmozilla.so: clase ELF errónea: ELFCLASS64]
LoadPlugin: failed to initialize shared library /usr/lib/totem/gstreamer/libtotem-cone-plugin.so [/usr/lib/totem/gstreamer/libtotem-cone-plugin.so: clase ELF errónea: ELFCLASS64]
LoadPlugin: failed to initialize shared library /usr/lib/totem/gstreamer/libtotem-gmp-plugin.so [/usr/lib/totem/gstreamer/libtotem-gmp-plugin.so: clase ELF errónea: ELFCLASS64]
LoadPlugin: failed to initialize shared library /usr/lib/totem/gstreamer/libtotem-mully-plugin.so [/usr/lib/totem/gstreamer/libtotem-mully-plugin.so: clase ELF errónea: ELFCLASS64]
LoadPlugin: failed to initialize shared library /usr/lib/totem/gstreamer/libtotem-narrowspace-plugin.so [/usr/lib/totem/gstreamer/libtotem-narrowspace-plugin.so: clase ELF errónea: ELFCLASS64]
LoadPlugin: failed to initialize shared library /usr/lib/swfdec-mozilla/libswfdecmozilla.so [/usr/lib/swfdec-mozilla/libswfdecmozilla.so: clase ELF errónea: ELFCLASS64]

Gracias.