Is the news getting you down? Well about to be cheered up with substitutions that make reading the news more fun.
see http://xkcd.com/1288, https://xkcd.com/1625/
Now with custom substitutions! Simply right click the extension icon and click options to add your own.
some other xkcd jokes have made it into the newest version.
all credit to xkcd
also checkout s/keyboard/leopard, which inspired this extension.