Turn volume down before clicking
Random sounds
Yesterday I ran into the JS Web Audio API and found it capable of real time audio synthesis. Based on some earlier experience with SuperCollider I expanded on two tutorial snippets which resulted in this random sound generator capable of producing quite a wide range of sounds. Each time that the page is (re)loaded it will create a random stack of modulators with different shapes and frequencies. 
It starts producing sound right away and is silenced when the tab is not active, so you’ll have to move it to a window of it’s own if you find a sound you like and want to continue browsing while it plays on.