If the disconnected device is indeed suspicious, to keep your information safe, you should change your { -product-firefox-account } password in your account settings. You should also change any other passwords you saved in { -brand-firefox } by typing about:logins into the address bar.
Si le apparato disconnectite es in effecto suspecte, pro mantener tu informationes secur, tu debe cambiar tu contrasigno de { -product-firefox-account } in tu parametros de conto. Tu deberea etiam cambiar omne altere contrasignos que tu ha salvate in { -brand-firefox } scribente about:logins in le barra de adresse.