In reply to Gonzalo Gasca.

Hi Gonzalo .

Thanks .. Firefox Implementation mentioned above supports VP8 and DTLS/SRTP instead of H.264 and SDES/SRTP. This is due to following reasons
1. DTLS/SRTP is a mandatory IETF requirement.
2. There is no decision made on the mandatory to implement (MTI) Video codec at the IETF yet. VP8 was open-sourced as part of the webrtc.org project. Its supported in the Firefox as part of webrtc.org tree pulled in.

On the other hand, ikran is not maintained any more, since the time we pulled it into the Firefox code-base. But it does provide H.264 support.

Hope this answers your questions.