Unknown Mozilla dev addon "Looking Glass 1.0.3" on browser

Looks like it's a promo for Mr Robot, which is really not ok.

> What's happening? Are you a fan of Mr Robot? Are you trying to solve one of the many puzzles that the Mr Robot team has built? You’re on the right track. Firefox and Mr Robot have collaborated on a shared experience to further your immersion into the Mr Robot universe, also known as an Alternate Reality Game (ARG). The effects you’re seeing are a part of this shared experience.[0]

EDIT: looking at this[1] comment, perhaps it's not a promo?

[0]: https://support.mozilla.org/en-US/kb/lookingglass [1]: https://www.reddit.com/r/firefox/comments/7jh9rv/what_is_loo...

From the page:

> No changes will be made to Firefox unless you have opted in to this Alternate Reality Game.

Also, from the same page for those that appreciate irony:

> One of the 10 guiding principles of Mozilla's mission is that individuals' security and privacy on the internet are fundamental and must not be treated as optional. The more people know about what information they are sharing online, the more they can protect their privacy.

> No changes will be made to Firefox unless you have opted in to this Alternate Reality Game.

How does it not occur to them that this is a clear lie?

I hardly think it's a lie. My browser contains no trace of anything related to Looking Glass, even though I'm opted into Shield Studies. It seems to affect some people but not others. Definitely something that should be fixed in the core mechanism of how these things are downloaded by your browser if there are cases where it can happen without user intervention, but it doesn't seem to be intentional to download extensions without the user's consent.