I think is Media Source Extensions support which is "not working" for Firefox see http://www.bbc.co.uk/rd/blog/2014/03/media-source-extensions http://www.bbc.co

I think is Media Source Extensions support which is "not working" for Firefox see http://www.bbc.co.uk/rd/blog/2014/03/media-source-extensions http://www.bbc.co.uk/rd/blog/2014/03/media-source-extensions