This is the first I hear about Normandy[1]. Firefox has been my main browser for a long time, only because I could use uBlock origin. Now, all of a sudden that is disabled, and with the recent version they got rid of my ability to always prevent autoplaying of videos.
Apparently, there is no one associated with browsers can be trusted in the least.
[1]: https://wiki.mozilla.org/Firefox/Normandy/PreferenceRollout