Dear Venkat,
as this thread is closed I suggest to to open a new one with your question/problem.
Basically I can also answer the question if this is all you want to know:
- Firefighter ID : the user id which is defined as firefighter. This user account is type of service.
- Firefighter : we call the user who is using a Firefighter ID as Firefighter.
If you need more please open a new thread with your question.
Thanks and regards,
Alessandro