  Mobile devices are increasingly utilized to access social media and instant
messaging services, which allow users to communicate with others easily and
quickly. However, the misuse of social media and instant messaging services
facilitated conducting different cybercrimes such as cyber stalking, cyber
bullying, slander spreading and sexual harassment. Therefore, mobile devices
are an important evidentiary piece in digital investigation. In this chapter,
we report the results of our investigation and analysis of social media and
instant messaging services in Firefox OS. We examined three social media
services (Facebook, Twitter and Google+) as well as three instant messaging
services (Telegram, OpenWapp and Line). Our analysis may pave the way for
future forensic investigators to trace and examine residual remnants of
forensics value in FireFox OS.
