Uhh, you absolutely can disable telemetry, it's in the Privacy and Security section of about:preferences, see here: https://support.mozilla.org/en-US/kb/telemet

Uhh, you absolutely can disable telemetry, it's in the Privacy and Security section of about:preferences, see here: https://support.mozilla.org/en-US/kb/telemetry-clientid https://support.mozilla.org/en-US/kb/telemetry-clientid . Disabling telemetry is also interpreted as a deletion request, so anything collected so far will be deleted.