У вашего броузера проблема в совместимости с HTML5
Pixel Frame is a grid of 256 ultra-bright LED pixels, perfect for showcasing pixel art and old school video game graphics.
This frame use 16x16 matrix of ws2812b addressable RGB LED strip.
Arduino Source Code + Script for convert gif2txt: https://github.com/arion/ArduinoProjects/tree/master/matrixbox
Scheme: http://take.ms/kQmSI