The website is sponsored by American Battle Monuments Commission (ABMC) but produced by a private concern. Much of the information is incomplete or, in many cases, erroneous. Briscoe is interred at American Battle Monuments Commission Florence Cemetery in Florence.
You may also want to order his deceased file. The file will contain the company of the 141st to which he was assigned, exact location of his death and other useful information. You'll find instructions at Message #2112.