Confusing checkbox in about:preferences#privacy
Simon Mainey discovered and reported a confusing checkbox behavior here: https://bugzilla.mozilla.org/show_bug.cgi?id=1447226
Simon told me this error was also visible in Tor Browser. I confirmed that the
app.shield.optoutstudies.enabled seems to be
true by default. We should set this to false or backport the patch in the Mozilla bug.