Are there any specific differences in handling cookies between Firefox and Google Chrome that could be causing this issue?

Issue: The issue may be related to how cookies are handled differently between Firefox and Google Chrome. One potential solution is to set the cookie domain explicitly to prevent any cross-browser compatibility issues. PHP code snippet:

setcookie('cookie_name', 'cookie_value', time() + 3600, '/', 'your_domain.com', false, true);