1. I notice it yesterday, only because Avast was showing I have a low trust level Add-On installed in Firefox.
2. I googled it, and the first results was from Mozilla, showing it was part of their studies and experiment.
3. That was Ok, because I trust Mozilla, although somewhere in the back of my mind I thought every studies were supposed to be opt-in, since I have a few Add On installed in the week and I dont restart my browser, I thought i might have clicked it by mistake.
4. Now I am reading this through, I am more then worried. If I am reading the online comment correctly, Mozilla installed an Add On without user permission, enabled, collected data, and not for their own UX studies but a third party.
And to make the matter worst, that Add-On is now gone. It disappeared in my Add on Screen now I just check. Call me old fashion but that is not how i view privacy.
Like I said before, Mozilla's management and culture has a tendency of self destruction and messing things up right after they start being good. Still this is turning around much quicker then I thought.