Earlier quoted context omitted.
> you also need to explicitly opt-in Wrong, as far as I see: Looking in my about:config, I see app.shield.optoutstudies.enabled=true browser.onboarding.shieldstudy.enabled=true enabled by default . The settings that I've changed from the default are shown in bold. These aren't bold. Those are the defaults. Everybody can check. That means that the user must actively take steps to disable them, if he knows that they ex…
Are you sure that's what those config options do? I tried looking them up, but they don't seem to be listed in Mozilla's config documentation: http://kb.mozillazine.org/About:config_entries According to the Wiki page I linked in my previous comment, global settings shouldn't even matter in this case; since each SHIELD study must be opted into on an individual basis. (Or at least, that's how it's _supposed_ to work.)…
https://normandy.readthedocs.io/en/latest/user/actions/opt-o...
"opt-out-study: Install a Study Add-on Without Prompting
The opt-out-study action installs an add-on, typically one that implements a feature experiment by changing Firefox and measuring how it affects the user."
They are obviously the topic of:
app.shield.optoutstudies.enabled=true
That I mentioned.
I see a lot of commenters trying to excuse them. The problem is, people allowed the "studies" because Mozilla claimed that they are "measuring" whatever "to make Firefox better." They never told anybody that they are selling the "studies" functionality which silently installs ("opt-out" not opt in!) to the advertisers.
I don't know how anybody can defend such an approach.