I'm using it with Clickbait Remover for Youtube(I cannot add url, so replace spaces with dots: addons mozilla org/en-US/firefox/addon/clickbait-remover-for-youtube) and ublock and it freezes me the youtube. If I disable any of these 3, youtube works again - still if I disable this one I have the best results, because if I keep this one with any other I have high CPU usage. I tried it on different browsers.