from pyvirtualdisplay import Display
from selenium import webdriver

display = Display(visible=False, size=(800, 600))
display.start()

browser = webdriver.Firefox()

selenium.common.exceptions.WebDriverException: Message: 'The browser appears to have exited before we could connect. The output was:
(process:2963): Gtk-WARNING **: Locale not supported by C library.
    Using the fallback 'C' locale.
    Xlib:  extension "RANDR" missing on display ":1082.0".

    (firefox-bin:2963): libgnomevfs-WARNING **: Unable to create ~/.gnome2 directory: Permission denied
    Could not create per-user gnome configuration directory `/var/www/.gnome2/': Permission denied'

daniel@daniel:/var/www$ ls -la
total 12
drwxr-xr-x  2 root root 4096 Sep 15 11:43 .
drwxr-xr-x 14 root root 4096 Oct  2 08:54 ..
-rw-r--r--  1 root root  177 Sep 15 11:43 index.html