У вашего броузера проблема в совместимости с HTML5
Neopixel RGB LED Matrix made with WS8212 strips. Currently 28x17 and will be expanded to 25x25 shortly. Powered by a 5v 20A PSU. Data sent via Jinx! LED control software over WiFi to an ESP8266 (Wemos D1) using the tmp2.net protocol.
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ESP8266 code available on my GitHub : https://github.com/thearduinoguy/WemosNeopixelControl
Jinx! LED Control Software : http://www.live-leds.de/