It seems as though Samsung is now in the practice of building their own browser engine, and they've teamed with Mozilla to do so. Mozilla is planning to implement its new Servo browser engine, which is reported to take advantage of the ARM architecture.
Mozilla, AT&T, and Ericsson collaborate to integrate calls and your browser
Mozilla, AT&T ,and Ericsson are all teaming up to bring their WebRTC-based concept to MWC. The idea will allow users to make voice calls, access their contacts, and share files from a web browser linked to their mobile number.
Mozilla Firefox OS phones and features showcased in preview video