I've been working with Firebird for a long time and recommend to NOT use it in any way. They have many fundamental problems that Postgres does not have. Not to say many, just say they don't still have 'alter view' command. To alter a view you must drop and recreate it and all views depending on it. This is one of many misfeatures of FB. It's not correct to compare these DB Engines at all. I've had many cases when Firebird database was corrupted even without power loss, with usual workloads, and so on. If you still deciding, don't use Firebird! If you already chose FB, you will remember my words some time later :)
