EME being in the standard does not make it good.Preventing somebody from using the video as she wishes (e.g., forcing her to watch ads, preventing her from saving the downloaded file, imposing a limit on the number of times the video is watched, etc.) clearly goes against freedom 0, the freedom to run the program, for any purpose.
DRMs are incompatible with free software. There is no such a thing as a free DRM. And, indeed, Firefox will download blobs to impose usage restrictions.
