The new version of Firebird ODBC driver is in Beta stage now. The new version uses new Object Oriented Firebird client API, works only with Firebird 3+, and requires fbclient.dll from Firebird 3 or above.
Version 3.0 Beta is available for testing on Windows: https://github.com/FirebirdSQL/firebird-odbc-driver/wiki
Please download, test, and report any issues!
Issues can be reported here: https://github.com/FirebirdSQL/firebird-odbc-driver/issues