Mastodon の静的ページで絵文字を動かします。

mastodon_animate_emoji.user.js

// ==UserScript==
// @name        [Mastodon] animate emoji on static pages
// @namespace   hen.acho.co
// @include     /^https?:\/\/[^\/]+\/(?:@\w+|users\/\w+\/(?:statuses|updates))\/\d+/
// @version     1.200804
// @description We can 👀 animated emoji without logging in!
// @downloadURL https://gist.github.com/pacochi/d1a8e019fdfc02235df7686af62d9895/raw/mastodon_animate_emoji.user.js
// @run-at      document-idle
// @grant       none
// ==/UserScript==

{
	document.querySelectorAll('img.emojione[alt^=":"]').forEach(cemoji => {

		if (cemoji.dataset.static) return(cemoji.src = cemoji.dataset.static = cemoji.dataset.original);

		const orig = cemoji.src;
		cemoji.addEventListener('error', e => e.target.src = orig, { once: true });
		cemoji.src = cemoji.src.replace(/\/static(\/.+\.png)/, '/original$1');

	});
}