diff --git a/plugins/dbgate-plugin-firebird/src/backend/driver.js b/plugins/dbgate-plugin-firebird/src/backend/driver.js
index 7fc0791e3..ebec5f431 100644
--- a/plugins/dbgate-plugin-firebird/src/backend/driver.js
+++ b/plugins/dbgate-plugin-firebird/src/backend/driver.js
@@ -4,6 +4,7 @@ const stream = require('stream');
 const driverBase = require('../frontend/driver');
 const Analyser = require('./Analyser');
 const Firebird = require('node-firebird');
+const { normalizeRow } = require('./helpers');
 const { getLogger, extractErrorLogData, createBulkInsertStreamBase } = require('dbgate-tools');
 const sql = require('./sql');
 
@@ -62,7 +63,7 @@ const driver = {
     const columns = res?.[0] ? Object.keys(res[0]).map(i => ({ columnName: i })) : [];
 
     return {
-      rows: res ?? [],
+      rows: res ? await Promise.all(res.map(normalizeRow)) : [],
       columns,
     };
   },
@@ -108,10 +109,6 @@ const driver = {
     }
   },
 
-  async writeTable(dbhan, name, options) {
-    return createBulkInsertStreamBase(this, stream, dbhan, name, options);
-  },
-
   async script(dbhan, sql, { useTransaction } = {}) {
     if (useTransaction) return this.runSqlInTransaction(dbhan, sql);
 
diff --git a/plugins/dbgate-plugin-firebird/src/backend/helpers.js b/plugins/dbgate-plugin-firebird/src/backend/helpers.js
index cadaf62fe..ff85f5485 100644
--- a/plugins/dbgate-plugin-firebird/src/backend/helpers.js
+++ b/plugins/dbgate-plugin-firebird/src/backend/helpers.js
@@ -89,6 +89,43 @@ function getFormattedDefaultValue(defaultValue) {
 
   return defaultValue.replace(/^default\s*/i, '');
 }
+function blobStreamToString(stream, encoding = 'utf8') {
+  return new Promise((resolve, reject) => {
+    const chunks = [];
+    stream.on('data', chunk => {
+      chunks.push(chunk);
+    });
+    stream.on('end', () => {
+      resolve(Buffer.concat(chunks).toString(encoding));
+    });
+    stream.on('error', err => {
+      reject(err);
+    });
+  });
+}
+
+async function normalizeRow(row) {
+  const entries = await Promise.all(
+    Object.entries(row).map(async ([key, value]) => {
+      if (value === null || value === undefined) return [key, null];
+      if (typeof value === 'function') {
+        const result = await new Promise((resolve, reject) => {
+          value(async (_err, _name, eventEmitter) => {
+            try {
+              const stringValue = await blobStreamToString(eventEmitter, 'utf8');
+              resolve(stringValue);
+            } catch (error) {
+              reject(error);
+            }
+          });
+        });
+        return [key, result];
+      }
+      return [key, value];
+    })
+  );
+  return Object.fromEntries(entries);
+}
 
 module.exports = {
   getDataTypeString,
@@ -96,4 +133,6 @@ module.exports = {
   getTriggerTiming,
   getFormattedDefaultValue,
   getTriggerCreateSql,
+  blobStreamToString,
+  normalizeRow,
 };
diff --git a/plugins/dbgate-plugin-firebird/src/frontend/driver.js b/plugins/dbgate-plugin-firebird/src/frontend/driver.js
index 76f00051c..7cff1ed3a 100644
--- a/plugins/dbgate-plugin-firebird/src/frontend/driver.js
+++ b/plugins/dbgate-plugin-firebird/src/frontend/driver.js
@@ -7,7 +7,7 @@ const dialect = {
   ilike: true,
   multipleSchema: false,
   stringEscapeChar: "'",
-  fallbackDataType: 'varchar',
+  fallbackDataType: 'varchar(256)',
   anonymousPrimaryKey: false,
   enableConstraintsPerTable: true,
   stringAgg: true,
@@ -15,6 +15,7 @@ const dialect = {
   dropColumnDependencies: ['dependencies', 'primaryKeys', 'foreignKeys', 'indexes', 'uniques'],
   changeColumnDependencies: ['dependencies', 'primaryKeys', 'indexes', 'uniques'],
   renameColumnDependencies: ['dependencies', 'foreignKeys', 'uniques'],
+  defaultValueBeforeNullability: true,
 
   quoteIdentifier(s) {
     return `"${s}"`;
@@ -36,7 +37,7 @@ const dialect = {
   dropUnique: true,
   createCheck: true,
   dropCheck: true,
-  allowMultipleValuesInsert: true,
+  allowMultipleValuesInsert: false,
   renameSqlObject: true,
   filteredIndexes: true,
   disableRenameTable: true,
@@ -87,6 +88,13 @@ const firebirdDriverBase = {
       defaultDatabase: databaseFile,
     };
   },
+
+  adaptDataType(dataType) {
+    if (dataType?.toLowerCase() == 'datetime') return 'TIMESTAMP';
+    if (dataType?.toLowerCase() == 'text') return 'BLOB SUB_TYPE 1 CHARACTER SET UTF8';
+    return dataType;
+  },
+
   engine: 'firebird@dbgate-plugin-firebird',
   title: 'Firebird',
   supportsTransactions: true,