The COPPA error page in the Accounts setup dialog in Mozilla Firefox OS before 2.2 embeds content from an external web server URL into the System process, which allows man-in-the-middle attackers to bypass intended access restrictions by spoofing that server.
Mozilla Firefox OS before 2.2 allows physically proximate attackers to bypass the pass-code protection mechanism and access USB Mass Storage (UMS) media volumes by using the USB interface for a mount operation.