http://askubuntu.com/questions/359958/extensions-are-turned-off-after-reboot

extension-update.py

#!/usr/bin/env python3

import ast
import configparser
import os.path
import subprocess

restore_filename = '~/.config/autostart/restore-extensions.desktop'
active_extensions = subprocess.check_output(['gsettings', 'get', 'org.gnome.shell', 'enabled-extensions'])

print('Currently active extensions:')

for ext in ast.literal_eval(active_extensions.decode()):
    print('-', ext)

config = configparser.ConfigParser()
config.optionxform = str
config['Desktop Entry'] = {
    'Type': 'Application',
    'Exec': 'gsettings set org.gnome.shell enabled-extensions "%s"' % active_extensions.decode().strip(),
    'Hidden': 'false',
    'NoDisplay': 'false',
    'X-GNOME-Autostart-enabled': 'true',
    'Name': 'Restore Extensions',
    'Comment': 'Restore enabled extensions on login',
}

with open(os.path.expanduser(restore_filename), 'w') as f:
    config.write(f)

print("Command to restore currently active extensions added to", restore_filename)