У вашего броузера проблема в совместимости с HTML5
This firmware is based on HIDKeys:
http://www.obdev.at/products/vusb/hidkeys.html
Yeah, I know that it's not working correctly, but I've already fixed those bugs. This video was just the first working prototype.
Wanna start working with ATmega8 or AVR microcontrollers? Check out my blog for a very detailed introduction:
http://denilson.sa.nom.br/blog/2007-10-25/first-contact-with-atmega8-microcontroller-part-1/
The source-code for this firmware is available here:
https://bitbucket.org/denilsonsa/atmega8-hidkeys-helloworld/