Hello,
to protect my device against stagefright, I set: "media":false
But the media playback isn't disabled.
You can test it here:
http://www.webmfiles.org/demo-files
Bug: Unauthorized media playback
Bug: Unauthorized media playback
Mozilla/5.0 (Windows NT 10.0; WOW64; rv:47.0) Gecko/20100101 Firefox/50.0.1