Iconic history is a Chrome extension by Shan Huang that visualizes your browser history as a favicon stack. It creates a favicon for each url visited, and compiles all icons into a huge sequence based on access time. See interactive demo here.
Hypertext Remix is a browser-sequencer created by Lara Warman and Kellyn Loehr. The system generates systems sounds when the browser hits the edge of the screen. The speed of each box is set by the scroll bar and the sounds that are generated are all from the OS.