This is really unfortunate. For a while Firefox was really differentiating itself via the privacy space. If it's just going to be another Chrome, I might as well just use Chrome.
How would you feel if your global image storage platform was being used to store child imagery? As a good organisation, would you not want to create a way that this could be detected.
There already is. It's called go 'ole fashioned policing, and in most western countries there are well-established protocols like search warrants, probable cause, etc. that weigh and balance the rights of the individual with the important work of catching criminals.