Unknown Mozilla dev addon "Looking Glass 1.0.3" on browser

Many people seem to be shocked because Mozilla installed an add-on automatically. In my opinion, it doesn't really matter since the code is coming from Mozilla - they're building the whole browser, so they could introduce functionality anywhere. If someone distrusts their add-ons, why trust their browser at all?

The main question is what behavior is being introduced. I haven't researched deeply, but apparently the add-on does nothing until the user opts-in on studies.

This is being added to the browser, outside the realm of security updates, through what is supposed to be a UX improvement program, for commercial purposes. It's written by a commercial company that produces advertisement content. It's not clear this code is audited.

Sorry, but I'm uninstalling firefox. They have broken the basic trust I have in them as a user to not push arbitrary code to my machine against my interests.

Have fun in Lynx. that's probably the only browser that wouldn't do something like this.

Well maybe Safari, not because Apple wouldn't, but because they just don't care enough about ad revenue.

Chrome: They leech everything they can get away with, granted it goes only to Google, but you know it's just to feed their never-ending ad-revenue goal.

MS: They bypassed IE only ads, and went on to build ads into the entire OS.