discord_list_custom_emoji.js

// Open up Sever Settings → Emoji in your browser
// Open the dev console using F12
// Using the inspection tool, look for an element with the class .emojiRow-XXXX
// Edit the string ".emojiRow-zIc7ZX" below into whatever class you got from the previous script
// Paste the below script into the dev tools console
let str = "";
for (let emoj of $$('.emojiRow-zIc7ZX')){
  str += emoj.children[1].innerText;
  str += '\t'
  str += emoj.children[0].style['background-image'].replace('url("https://cdn.discordapp.com/emojis/', '').replace('.png?v=1")', '');
  str += '\n'
}
console.log(str);