Your .doc example is a good one. Mozilla explicitly refusing to support both H264 and Theora (because they want to make a stand) is like OpenOffice refusing to read both doc and odt, because doc is proprietary format.<p>I would prefer to see open, unpatented and free video codec used for the majority of web video. I applaud Mozilla for taking a stance. I don't applaud them taking a stance by limiting their users' freedom, instead of directly talking to Google, Vimeo and others and lobbying for the use of more open formats. Surely, a letter from Mozilla "hey guys, we really think you should support Theora too, let's meet and we'll tell you why we think it's very important" would have more effect than random blog articles &#38; what amounts to blackmail?