This is definitely not always the case in my experience, although that might be due to some addon (I have quite a few) hanging the main FF thread&#x2F;process.<p>I&#x27;d love to see a &#x27;task manager&#x27; that can show CPU usage as well as memory use by individual tabs, because occasionally I see CPU use spike (noticed by laptop fans spinning up) and am reduced to closing random tabs in the hope it&#x27;ll get better.