У вашего броузера проблема в совместимости с HTML5
With Minecraft 1.13 hot off the press, we experiment to see if it's now possible to jump over the void chasms found in the outer end isles. Testing out slow falling potions, dolphins, tridents and more, we'll try and figure out if these formidable obstacles can actually be beaten!
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Music: http://incompetech.com
Sound Effects: http://www.freesfx.co.uk/