XFCE - Always run Firefox without decorations?

I run openSUSE 12.3 XFCE, and would like to know if it’s possible to make Firefox run without window decorations per default?
For now, I have this python script assigned to a keyboard shortcut, which removes decorations of the active window:

#! /usr/bin/python
from gtk.gdk import *

w=window_foreign_new((get_default_root_window().property_get("_NET_ACTIVE_WINDOW")[2][0]))
state = w.property_get("_NET_WM_STATE")[2]
maximized='_NET_WM_STATE_MAXIMIZED_HORZ' in state and '_NET_WM_STATE_MAXIMIZED_VERT' in state
if maximized: w.unmaximize()
if w.get_decorations() == 0 :
    w.set_decorations(DECOR_ALL)
else:
    w.set_decorations(0)

if maximized: w.maximize()
window_process_all_updates()


I’d like XFCE to automatically remove decorations from Firefox, when it is started.

Reduces Titlebar to bare minimum
https://addons.mozilla.org/en-US/firefox/addon/hide-caption-titlebar-plus-sma/

Well, all the available versions, both public and development, of that addon won’t work with Linux.
There’s a notice “Not available for your platform” under the “Add to Firefox” button.
Do you have it working with Linux?
](https://addons.mozilla.org/firefox/downloads/file/171432/hide_caption_titlebar_plus-2.7.2-fx-windows.xpi?src=version-history)

I tried it and i works on GNOME 3.6. It doesn’t totally remove it(titlebar),but it is a thin strip now