Firebird-Export
Export a Firebird database to CSV, JSON or other formats is a Open Source project to export a Firebird database, show a summary of the database table names, field names, field data types, and index columns. Optionally extract and save table data to a directory, in CSV/JSON (or potentially in any other format), as well any other binary files from blobs.
A subset of the tables and fields can be specified (in python) and the number of records returned can be limited for testing purposes. Output data can be combined or into one or saved in individual files named after the tables.