У вашего броузера проблема в совместимости с HTML5
A new version of ChibiCube is ready! Enjoy the new teaser
http://www.chibios.org
Sourceforge code repo:
https://sourceforge.net/projects/s3dl-chibicube
You can find schematics, eagle gerber file and code at
http://forum.chibios.org/phpbb/viewtopic.php?f=8&t=1688&p=14381