Tampermonkey script - Google Chat Always Allow Animated Emojis (in case you have "prefers-reduced-motion" set to "reduce")

not-so-floaty.js

// ==UserScript==
// @name  Google Chat Always Allow Animated Emojis
// @match https://chat.google.com/*
// ==/UserScript==

(function() {
    'use strict';

    function main() {
        const pictureSources = document.querySelectorAll('picture > source');
        pictureSources.forEach((pictureSource) => {
            if (pictureSource.getAttribute('media') == '(prefers-reduced-motion: reduce)') {
                pictureSource.remove();
            }
        })
    }

    function debounce(fn, delay) {
        var timeout = null;
        return function() {
            if(timeout) {
                return;
            } else {
                timeout = setTimeout(function() {
                    fn();
                    timeout = null;
                }, delay);
            }
        }
    }

    main();
    var el = document.documentElement;
    el.addEventListener('DOMSubtreeModified', debounce(main, 2000));
})();