We're sorry to hear about this. You should change your Firefox Account password, and look for information from your device manufacturer about erasing your data remotely.
Suref-aɣ ɣef aya. Yessefk ad tesnifleḍ awal uffir n umiḍan inek Firefox udiɣ wali tinaḍin n umfares n yibenk inek akken ad tsefḍeḍ isefka yinek s wudem anmeggag.