Seconded (Firefox on Linux), it worked fine with the toggles but once it came to the map-based examples it stopped. Never saw a map scroll, and continuing down the page started to blank out the (assumed to be) maps, so I closed the tab.
Very nice-looking page, but perhaps a smidgen over-engineered for what it wanted to show? :)
Text selection also doesn't seem to work... is it all Canvas maybe?