I have a question related to cookie and session. Login page works very well in google chrome but unfortunately when I run program in Firefox it doesn't show properly. It means that I cant see my character that I typed in login and password in Firefox. config of session and cookie is as following. 

```
$config['sess_driver'] = 'files';
$config['sess_cookie_name'] = 'ci_session';
$config['sess_expiration'] = 7200;
$config['sess_save_path'] = NULL;
$config['sess_match_ip'] = FALSE;
$config['sess_time_to_update'] = 300;
$config['sess_regenerate_destroy'] = FALSE;

$config['cookie_prefix']    = '';
$config['cookie_domain']   = '';
$config['cookie_path']    = '/';
$config['cookie_secure']   = true;
$config['cookie_httponly']     = FALSE;

```