parse-firefox-session.py

#!/usr/bin/python

import json
import os
import sys

ff_folder = None

for f in os.listdir('/home/guest/.mozilla/firefox'):
  if f.endswith('.default'):
    ff_folder = f
    break

if ff_folder is None:
  sys.stderr.write('ERROR: Unable to locate the default FireFox profile folder in /home/guest/.mozilla/firefox\n')
  sys.exit(1)

result = {
  'windows': 0,
  'tabs': 0
}

with open('/home/guest/.mozilla/firefox/c3pp43bg.default/sessionstore.js') as json_data:
  session_data = json.load(json_data)

  for win_idx, win in enumerate(session_data['windows']):
    result['windows'] = result['windows']+1

    if 'tabs' in win:
      for tab_idx, tab in enumerate(win['tabs']):
        result['tabs'] = result['tabs']+1

    else: 
      print('No tabs found for window #%s' % str(win_idx+1))

print("windows=%s" % result['windows'])
print("tabs=%s" % result['tabs'])