performance data - about:telemetry very important!! BUG

about:telemetry

when i active performance data send(in deutsch Performanz Daten senden) and I use a other computer this function is immediately deactiveted.

So i think it isn a portable function and save data on each computer, is it so?
please control this, and add it to the note that every user of firefox portable it see when the user download portable firefox

V 19.0.

good bye

thanks