At the time of writing there's repaint bug in the animation framework of ChatGPT.com, causing it to boundlessly repaint even idle conversations, leading to high CPU and GPU (on weak GPUs) usage.
To fix this you can either past this into the console (after each page load):
(() => {
const style = document.createElement('style');
style.id = 'disable-animations-debug';
style.textContent = `
*, *::before, *::after {