У вашего броузера проблема в совместимости с HTML5
Download link for my setup:
https://mega.nz/#!NBZjDIxQ!HZU-4xsQs3hhyDELkZFkE2HyAl9_ne7zJjq1qEQiM3s
Assuming you have menuhax running, just extract that to the root of your 3DS SD card and voila, autoboot to Gateway 3DS/DSTwo+.
To boot to the homebrew launcher hold up when the menuhax splash screen shows up.