It seems that they will make Hello an add-on instead.
I'm not saying a clipping service like Pocket is bad, or a WebRTC service like Hello shouldn't exist, but it should never have been part of the base install. One of the greatest strengths of browsers like Firefox and Chrome is the ability to use plugins, yet Mozilla chose to forego that twice over.
http://www.howtogeek.com/228863/how-to-remove-firefox-hello-...
So, one has to assume a lazy, insecure method on their part until they prove otherwise. Assuming benevolence and diligence from a company that is blatantly anti-open-source is foolish.
Maybe they want to transform it into a regular addon. But the bugreport does not mention it, and I saw no additional explication elsewhere.