I think this whole thing is a bad idea. They won't allow a scary opt-out button because some software could turn it on, don't allow about:config because it could be flipped, don't allow a build flag in stable because malware could flip it and build. I mean... by that logic, couldn't someone reskin and redistribute alpha or the 'unbranded' with malware? Firefox is so afraid of malware, yet it encourages users to store their passwords in plain text in the browser?

It really feels like a landgrab and not anything anyone has been asking for. Firefox has to compete with the Chrome web store, but you can't burn your house down to save a room. What's left if Firefox becomes some centralized market akin to iOS, Windows Store, Play etc. Forced AMO signing flies in the face of the decentralized web. "Malware happened" and "Chrome does it" aren't really answers.

I think getting backed into a corner has made Moz take risks with their ideology. Hopefully they give developers and users a lot more time to deal with the upcoming changes.