Who's fault is that, at the end of the day?
Mozilla didn't have to structure their addon system in such a way that their (in)actions could disable the addons of every Firefox user on the planet.
Mozilla did not have to abuse the studies mechanism (also on by default) to ship a workaround.
Mozilla did not have to disable the option that would let me work around this problem by myself (which is going to cause me no end of fun when I get into work tomorrow). If the Firefox team thinks their development concessions are a pain in the ass, try being directly accountable for the repercussions, in the "I will be fired if I don't fix this", not the "I will be talked mean about on the internet if I don't fix this" senses.
Mozilla didn't have to bundle junk like Pocket and the now-scuppered Hello, both of which could have just as easily been addons suggested on first run.
Mozilla didn't have to push promotional addons (the Mr Robot thing) without my express prior consent.
I grow exceedingly weary of this narrative that Firefox is above all reproach and criticism because they produce a web browser.
How about this instead; if Mozilla wishes for its users to respect them, they can start by respecting their users. That means no opt-out telemetry period, no paternalism about what I can and cannot install, or what options I can change, and so forth.
I am beyond sick of this shit. I would love nothing more than a true third option for browsers right now. Firefox hates its users, Chrome sees them as cattle - what's left? I have to use one of the two and take ridiculous steps to cover my own interests, because neither of these companies have them in mind.