In case you're using Firefox on mobile - so myself and like four others - disabling Firefox' new Facebook data collection feature is quite a bit harder than on desktop, but it can be done:

  • Go to chrome://geckoview/content/config.xhtml
  • Use the search field to find the entry for aboutConfig and enable it
  • Go to about:config
  • Search for dom.private-attribution.submission.enabled and set it to false
  • Done. This only works on Android, because Firefox on iOS is just a Safari skin.

    @thomholwerda i use firefox on mobile because i need ublock origin >_> so thank you
    @eniko Yeah I use Firefox on Android for uBlock when I'm not at home (where we have a Pi-Hole to block all ads on our entire network), and because I use Firefox on desktop, and use the tab sharing feature a lot.
    @thomholwerda @eniko I have my phone rooted and I use AdAway to block all ads.
    The rest of my family uses AdGuard DNSs, have tried any of these?
    @eniko @thomholwerda I use Fennec, it's basically Firefox for Android but with the tracking and I think some other proprietary bits removed, if it helps you at all 😅
    @hazelnot @eniko @thomholwerda also using Fennec, quite pleased to discover my about:config already enabled and this 'private data' toggle completely absent

    @prokyonid @hazelnot @eniko @thomholwerda

    I would recommend you to have a look at it again. I observed the same when I saw the post first, but I just rechecked and now it is there. Enabled.

    I think fennec just had some delay until it was distributed.

    @jonasgraphie @hazelnot @eniko @thomholwerda I saw they pushed an update last night. Must have been sent through with that

    @prokyonid @hazelnot @eniko @thomholwerda

    Yes, definitely. I just checked: The update from July 26 is to Version 128. This is the version introducing this "feature".