Feature no 1 : Firebird required 0 Administration and is simpler to use than Postgresql
(think of sqlite like easy of use with oracle/postgresql like features)
2.Firebird does have Embedded mode and is fully multi threaded in 2.5
3.And yes Firebird is fully multithreaded where Postgresql is NOT
so we are ahead in this area with at least 2 or more years
"All backends running as threads in a single process (not wanted)
This eliminates the process protection we get from the current setup. Thread creation is usually the same overhead as process creation on modern systems, so it seems unwise to use a pure threaded model, and MySQL and DB2 have demonstrated that threads introduce as many issues as they solve. Threading specific operations such as I/O, seq scans, and connection management has been discussed and will probably be implemented to enable specific performance features. Moving to a threaded engine would also require halting all other work on PostgreSQL for one to two years."
I will update the post later with more features and links why does
http://mapopa.blogspot.com/2010/10/where-firebird-is-better-than.html
