Which are the losses in a MOSFET when used in PFC?

When the PFC is in working Continuous Conduction Mode:
- Conduction losses
- Turn on and off (Switching) losses
- Gate losses
- Output capacitance (i.e. Co(er)) losses

When the PFC is in Critical Conduction Mode:
- Conduction losses
- Turn off losses
- Gate losses
- Output capacitance (i.e. Co(er)) losses.