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https://www.dropbox.com/s/93lzdlmd8ph42me/Bright%20Dale.json?dl=0

So it still doesn't work for you? I'm out of ideas, your file is loaded normally for me. Maybe you should try another browser, maybe something is wrong with your browser's settings/permissions (as you said). But in this case there should be messages in the console, not just that "devicemotion" one.