Hey Daren,
I have seen many players as I have quoted say that HTML5 should function normally . The problem is that live streaming using RTMP for transmissions and it is based on Flash. These players have swf files to run , for example , which has presented problems mainly in Firefox a couple of weeks ago since they disabled the Flash by security issues to be resolved.
You can see examples opening URLs below in Firefox:
http://flash.flowplayer.org/plugins/streaming/rtmp.html
In the short term Wowza plans to offer other forms of playback beyond formats RTMP , HLS (flawed in many Android devices) , HDS (Flash problem too) , Microsoft Smooth Streaming ( discontinued Silverlight)?