> Building on top of a browser or an operating system is a proven and solid model. http://en.wikipedia.org/wiki/Netscape#History http://en.wikipedia.org/wiki/N

> Building on top of a browser or an operating system is a proven and solid model. http://en.wikipedia.org/wiki/Netscape#History http://en.wikipedia.org/wiki/Netscape#History Microsoft's entire corporate history is full of incidents like Twitter's new policies. Building on top of browsers sounds safer than the Microsoft/Netscape scenario until you consider the possibility that the browser vendor might launch a competitor and use the browser to promote it (e.g. MPEG LA vs. Google/WebM).