Since your device was lost or stolen, to keep your information safe, you should change your { -product-firefox-account } password in your account settings. You should also look for information from your device manufacturer about erasing your data remotely.
鉴于您的设备丢失或被盗，为了确保信息安全，您应在账户设置中更改您的 { -product-firefox-account }密码，并从设备制造商处了解如何远程抹除数据。