Norton security popped up with "widevinecdm.dll" as "safe." I asked no one or anything to install it. Thus, I investigated what it is and how w/o permission it was installed. It happened after a firefox update. I've read several Mozilla posts on this but none answer the fundamental question why Mozilla is using a google id'd product since by definition this does not protect privacy. In fact google's reason to be is to mine data. And I find no one explaining what deficits to functioning occur if this is uninstalled.