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I have Firefox 34 and OpenH264 Video Codec provided by Cisco Systems v1.1 addon installed and enabled.

The problem is that Firefox can not play H.264 video. I used this page for testing and here is the screenshot:

h264

Also, I tried to test my browser using https://www.youtube.com/html5 and it does not detect H.264 as well:

enter image description here

Am I the only one who has this problem? Why does Cisco H.264 codec does not work?

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Found answer here:

Note: Firefox currently uses OpenH264 only for WebRTC and not for the tag, because OpenH264 does not yet support the high profile format frequently used for streaming video. We will reconsider this once support has been added.

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