You're scaring us

The Reddit thread linked in the GitHub issue is interesting:

- https://www.reddit.com/r/firefox/comments/7jh9rv/what_is_loo...

There are several scary things about this:

- Unknown Mozilla developers can distribute addons to users without their permission

- Mozilla developers can distribute addons to users without their knowledge

- Mozilla developers themselves don't realise the consequences of doing this

- Experiments are not explicitly enabled by users

- Opening the addons window reverts configuration changes which disable experiments

- The only way to properly disable this requires fairly arcane knowledge Firefox preferences (lockpref(), which I'd never heard of until today)