It happens fairly often that, while browsing, suddenly the cursor (touchpad) starts moving sluggishly, the LED light on my USB stick starts flickering without stopping (I use a Linux live CD on memory stick), and my CPU monitor shows it is working at 100% (and the monitor itself is freezing). My system is Porteus 3.2.2 and my browser is usually either Pale Moon, Firefox or Opera. The desktop is MATE.
So I know something is overloading my system, and so I want to kill my browser right away as otherwise I will have to wait possibly half an hour (or forever) for the system to get back to manageable.
But clicking the "force quit" icon in the toolbar is in this sort of situation hard to do if not outright impossible due to the lack of response of the system (and it takes 3 clicks in total to kill the browser: 1 on the icon in the toolbar, 1 in the browser window as soon as the cursor has changed into a cross, and 1 after getting a message asking if I really want to shut down the window). This whole kill sequence by itself can take maybe 10 minutes or more.
Is there a faster, better, more reliable way to do this?