I have bumped with weird problem and have no clue what happens and what is wrong. Website built in on CI platform. My CI uses table sessions and here is config
$config['sess_cookie_name'] = 'pi_session'.md5(date('mdY'));
$config['sess_expiration'] = 7200;
$config['sess_expire_on_close'] = FALSE;
$config['sess_encrypt_cookie'] = FALSE;
$config['sess_use_database'] = TRUE;
$config['sess_table_name'] = 'sessions';
$config['sess_match_ip'] = FALSE;
$config['sess_match_useragent'] = TRUE;
$config['sess_time_to_update'] = 7200;
It worked well all the time but recently I suddenly couldn't login into admin area in FF. But all work well on localhost sever in the same browser. In Chrome I can login from both remote and localhost. But other guy told me that he can login in FF but can't in Chrome. When I load login page on remote server in FF it creates 2 records in the ci_sessions table instead of one, the same action in Chrome creates 1 record only and login option work well.
61a182973989856167cfa945519705ed 12.68.11.93 Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36 1489174945
66fc8c300986a83eb58514a6aafef360 12.68.11.93 Mozilla/5.0 (Windows NT 10.0; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0 1489174908
bbc0c642bd0049d3bc4d663ea94273db 12.68.11.93 Mozilla/5.0 (Windows NT 10.0; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0 1489174907
The first record is when I opened page in chrome, 2-3 I opened page in FF. What a?