GreaseMonkey script to allow easy typing of hacker font in niu.moe Download the extension and open the raw link of the following file to install: https://addons.mozilla.org/en-US/firefox/addon/greasemonkey/

hackerfont.user.js

// ==UserScript==
// @name     Hacker buttons
// @version  1
// @include  *niu.moe*
// @grant    none
// ==/UserScript==

setTimeout(function() {
  hackerbutton = document.createElement("img");
  hackerbutton.src = "https://cdn.niu.moe/custom_emojis/images/000/004/734/original/934bc263da8d1735.png";
  hackerbutton.width = "26";
	hackerbutton.onclick = function() { hacker() };
	document.getElementsByClassName("emoji-picker-dropdown")[0].appendChild(hackerbutton);
}, 3000);

function hacker() {
    text = prompt("Type your message:");
    emojiform = "";
    for (i = 0; i < text.length; i++) {
        if (text[i] != " ") {
            var letter = text[i].toLowerCase();
            emojiform += ":hacker_" + letter + ": ";
        } else {
            emojiform += "\n";
        }
    }
    document.getElementsByClassName("autosuggest-textarea__textarea")[0].value = emojiform;
}