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:
Also, I tried to test my browser using https://www.youtube.com/html5 and it does not detect H.264 as well:
Am I the only one who has this problem? Why does Cisco H.264 codec does not work?