Firebird 3.0.2 Package is uploaded into Firebird 3.0 ppa for current ubuntu releases .

There are packages for Ubuntu 17.04 (Zesty ), 16.10 (Yakkety) , 16.04 LTS (Xenial) and 14.04 LTS (Trusty).

Firebird 3.0.2 changes are available in the release notes