This is pretty much accurate.<p>There are plenty of other containers, audio formats, and video formats that are believed to be mostly patent-free; the same status as Theora.  Firefox won't support any of them.  Not Dirac the video format, not Matroska the container format, not FLAC the audio format, and so forth.  Despite the fact that, for example, Matroska is far better-designed, more capable, and more popular than Ogg.<p>Mozilla could care less about patents: all they want is to promote their pet solutions at the expense of everyone else.