This manual covers multiple versions. New Firebird versions may add new configuration options, deprecate configuration options (i.e. use is discouraged but still supported), and even remove configuration options entirely.

For each configuration option, we document the version that added, deprecated or removed an option.

For example, say an option is added in Firebird 4.0, deprecated in 5.0, and removed in 6.0, that would be shown as:

If an option is added/deprecated/removed in a point release, the point-release version (e.g. 4.0.3) will be used.

For an option which is added in Firebird 5.0, and not deprecated and removed, it just shows:

If an option already existed in Firebird 3.0 or older, we do not show an Added item. However, if an option was deprecated in an older version, and still exists in Firebird 4.0, it is listed with the version that deprecated it.

For example:

Options which were removed with or before Firebird 4.0.0 are not documented.