Jack Cook has a great post about a side-channel attack on web browsers.
He explains the attack very well and illustrates it with some nice hands-on examples that run the browser. What I like most is that he outlines how he developed the attack by simplifying a more complex approach and applying AI to the results. It’s quite sobering in its simplicity and power. Really well done. If you have any interest at all in this sort of thing, give it a read.