If you upgrade to the official version, you'll be able to use more features and not have to edit the script's code. You can edit the list of players by pressing F12, click on Console, then type
localStorage.Players = "player 1, player 2";
To add more players to the list, do
localStorage.Players += ", player 3";
Change players 1-3 with whatever you like.
Edited 5/12/2017 07:36:51