If you mean would it be better or worse if they did a more traditional pop-up ad promotion for Mr. Robot like they did for their VPN service...I dunno, unfortunately I've grown to expect new Firefox releases to have found excuses for promoting Mozilla services, even though I've done a fair amount of work to try to disable all that nonsense.
At the end of the day, it's all pretty gross really. What I'd really like is a way to pay Mozilla actual money in a way that ensured it was directed solely at development of Firefox in exchange for not doing any of this stuff to me. But for some reason this doesn't seem possible.
I mean if it wasn't an add-on at all. If it was a piece of javascript or even C++ contained directly inside the program, that triggered on the same about:config setting. A traditional easter egg.