4 ms·

It's opt-in AFAIK.

• nacs 5y ago
  It's opt-out for many -- for me it was enabled by default after an upgrade.
  • jjulius 5y ago
    Is it at all possible that you quickly skipped through the dialogue box asking about it when you first opened FF after that upgrade? I only ask because I caught myself almost doing that before I did a double-take.