bools works ok with firebird 3.0 in node-firebird

test_bool.js

sys = require("sys")
var Firebird = require('node-firebird');

var options = {};

options.host = '127.0.0.1';
options.database = '/tmp/test.fdb';
options.user = 'SYSDBA';
options.password = 'masterkey';

Firebird.attach(options, function(err, db) {

    if (err)
        throw err;

    db.query('SELECT r.SEC$ACTIVE FROM SEC$USERS r', function(err, result) {
        console.log(sys.inspect(result));
        db.detach();
    });

});

[ { 'sec$active': true } ]