The result of deleting cookie is different in different browsers?

one of my previous questions is how to delete Baidu statistics cookie to kill the second-level domain name. Then search for a method:
configure in nginx: 

 add_header Set-Cookie "UM_distinctid=deleted;expires=Thu, 01 Jan 1970 00:00:00 GMT;path=/;domain=css.example.com";

then, it is found that the results are different for the same address Chrome (version 65.0.3325.181 (official version) (64 bit)) and FF (59.0.2 (64 bit)):
FF:

CHrome:

Firefox chrome nginx
Mar.02,2021

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b381a7-34498.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b381a7-34498.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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