URL: https://app.kktv.me/play/02000027010001
Browser / Version: Firefox 50.0
Operating System: Mac OS X 10.11
Problem type: Video doesn't play

Steps to Reproduce

1. Navigate to: https://app.kktv.me/play/02000027010001
2. Screen shows Firefox is not supported. Only support Chrome and Safari now, suggest to download Google Chrome.

Expected Behavior:
Video playing

Actual Behavior:
Shows Firefox not supported.

If I switch UA to Chrome on Mac OS X, video plays fine.

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