ping
I note that this Mozilla Initiative is over a year old. This is not new news.
I use Firefox every day at work and home on a dozen different computers, each with various flavors of Linux, Mac and Windows, because it's seamlessly portable between them.
I haven't seen any evidence of it doing anything untoward, not that it can't or couldn't, just saying, it hasn't stopped me from doing or seeing anything. I'm on FR everyday and no sign of trouble.
Just sayin', I think they're blowing smoke -- virtue-signalling if you will -- this Initiative hasn't done a thing I'm aware of. :-)