Yes, and you can likely thank the backlash / such comments for this change of heart. Oh, you were implying they always highly valued Addons for their new FF? I don't see anything in this blog post supporting that stance.
Maybe its just me being disgruntled / fondly remembering the XUL days (pre multi-process in 2008ish was when I was messing around with it) were it felt like addons could anything. The possibilities seem way more restrictive now that there only seems to be a specific list of white-listed api's. Scaling that back even more for performance and (somewhat justified) security reasons seemed like the next natural step.
Anyway, I'm thankful for leaving a comment.
At the same time, all Addons I've installed right now require "Access your data for all websites", making absolute trust in the developer / reviewer necessary.
My understanding (from the outside, so probably wrong) was that a while back they had an expired certificate that broke all add-ons. This caused the existing Firefox for Android (Fennec) to get a bunch of 1-star reviews on Google Play Store, and _that_ (plus the complaints elsewhere) convinced them that not having add-ons in Firefox Preview (Fenix) was a bad idea.
