Some links to fun things you can do in your browser.
Take a road trip in your browser! Everyone currently watching votes on which direction to turn and what to put on the radio.
Search through Web 1.0 graphics courtesy of the Internet Archive.
Play a game about collecting dragon eggs, raising them to adulthood, and breeding them to create interesting lineages.
Try playing some parser fic.
If parser fic is a bit too retro for you, play some DOS games.
Put together a fractal jigsaw puzzle.
Paint the world with wplace. Check out Las Vegas to see some excellent New Vegas pixel art!
Take a trip to the edge of the solar system!
See random points of interest in Google Street View!
Try some wildlife watching.
Play a more complicated version of rock paper scissors.
Nuke your city!