Yeah on desktop. On mobile it's a lot harder. It's still turned on and you have to use a workaround to enable about: config because they don't bother to make this option visible in settings.
And it felt kinda good, i actually thought that Firefox was different and a part of "the good guys", now it doesn't feel that way anymore. Sigh.
Maybe one day we'll have a usable FOSS browser but I doubt it (the companies will fight tooth and nail against it including legal means, buying out companies, blocking content for them, etc.).
I know of no workaround short of installing from the Beta or Nightly channel.
source: https://connect.mozilla.org/t5/ideas/firefox-for-android-abo...
And then you can go to the normal about:config and set dom.private-attribution.submission.enabled to false
Only then is PPA actually off (apparently, I did not manage to test this yet but someone did confirm the default setting is true). Not cool. Especially because Mozilla provides instructions for the desktop version on their site but doesn't even mention the mobile version at all.
128.0 (Build #2016030615)
Wonder why this is even an issue.