The situation is similar to what Mozilla faced in 2012 when it added support for the patent-laden h.264 video codec in order to avoid irrelevance. As the blog post puts it, not adding the tech would force users to switch to Internet Explorer, Chrome or Safari which are already implementing support. While future versions of Firefox will support the DRM technology (known as EME and CDM), users will be able to turn it on or off on their own, and the closed source code will be surrounded by an open source wrapper. In a technical breakdown of what it plans to do, Mozilla explains it's using Adobe Access DRM tech. The implementation means the DRM can work by binding content to the device it's playing on, but also control how much information about the user is being revealed. According to the FAQ, right now the tech is only coming to desktop Firefox, and not Firefox on Android or Firefox OS.