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Firefox 49 error "This browser does not support video playback" playing mp4 videos in Twitter in Win 8.1 with Flash Player 23.0.0.162 | Firefox Support Forum | Mozilla Support
Zed A. Shaw, Writer on Twitter: "Watch Firefox lie. See how it reports that the video cannot be played, but then whoAAAAA! Magic it plays just fine. Maybe it can't be *streamed*,
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Playing Videos in Firefox Ubuntu Issue | Fix Your Browser Can't Play This Video on Linux - YouTube
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Why some videos can be played in firefox but some cant? - Super User
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