diff --git a/apps/desktop/src/components/connection/ConnectionDialog.vue b/apps/desktop/src/components/connection/ConnectionDialog.vue
index 40cf0451b7..3bb10d01e3 100644
--- a/apps/desktop/src/components/connection/ConnectionDialog.vue
+++ b/apps/desktop/src/components/connection/ConnectionDialog.vue
@@ -3937,6 +3937,20 @@ const postgresClientKeyPath = computed({
     form.value.url_params = setUrlParam(form.value.url_params, "sslkey", value);
   },
 });
+// Firebird 的 Java 驱动（Jaybird）默认按 JVM 编码（UTF-8）解码 CHARACTER SET NONE
+// 字段，历史数据若以 GBK 等编码存放就会显示为乱码。这里把连接字符集映射到 JDBC URL 的
+// charSet 参数（复用通用 URL 参数通道），交给用户按数据实际编码选择。
+const FIREBIRD_CHARSET_OPTIONS = ["UTF8", "GBK", "GB18030", "BIG5", "ISO8859_1", "Cp1252"];
+const firebirdCharsetItems = computed(() => {
+  const current = getUrlParam(form.value.url_params, "charSet");
+  return current && !FIREBIRD_CHARSET_OPTIONS.includes(current) ? [current, ...FIREBIRD_CHARSET_OPTIONS] : FIREBIRD_CHARSET_OPTIONS;
+});
+const firebirdCharset = computed({
+  get: () => getUrlParam(form.value.url_params, "charSet") || "default",
+  set: (value: string) => {
+    form.value.url_params = setUrlParam(form.value.url_params, "charSet", value === "default" ? "" : value);
+  },
+});
 const redisTlsInsecure = computed({
   get: () => getUrlParam(form.value.url_params, "insecure").toLowerCase() === "true",
   set: (value: boolean) => {
@@ -9349,6 +9363,24 @@ function openExternalUrl(url: string) {
                       </label>
                     </div>
 
+                    <div v-if="form.db_type === 'firebird'" class="grid grid-cols-4 items-start gap-4">
+                      <Label :class="connectionLabelTopClass">{{ t("connection.firebirdCharset") }}</Label>
+                      <div class="col-span-3 space-y-1.5">
+                        <Select v-model="firebirdCharset">
+                          <SelectTrigger class="h-9">
+                            <SelectValue />
+                          </SelectTrigger>
+                          <SelectContent>
+                            <SelectItem value="default">{{ t("common.default") }}</SelectItem>
+                            <SelectItem v-for="charset in firebirdCharsetItems" :key="charset" :value="charset">{{ charset }}</SelectItem>
+                          </SelectContent>
+                        </Select>
+                        <p class="text-xs leading-5 text-muted-foreground">
+                          {{ t("connection.firebirdCharsetHint") }}
+                        </p>
+                      </div>
+                    </div>
+
                     <div v-if="supportsGenericUrlParams" class="connection-url-params-row grid grid-cols-4 items-start gap-4" :class="{ 'connection-url-params-row--compact': !showGenericUrlParamsHint, 'connection-url-params-row--with-hint': showGenericUrlParamsHint }">
                       <Label :class="[connectionLabelClass, 'connection-url-params-label']">{{ t("connection.urlParams") }}</Label>
                       <div class="col-span-3 space-y-1.5">
@@ -9375,7 +9407,9 @@ function openExternalUrl(url: string) {
                                               ? 'localdatacenter=dc1'
                                               : form.db_type === 'transwarp'
                                                 ? 'fetchSize=500;auth=noSasl'
-                                                : 'sslmode=prefer'
+                                                : form.db_type === 'firebird'
+                                                  ? 'charSet=GBK'
+                                                  : 'sslmode=prefer'
                           "
                         />
                         <p v-if="showGenericUrlParamsHint" class="text-xs leading-5 text-muted-foreground">
diff --git a/apps/desktop/src/i18n/locales/az.ts b/apps/desktop/src/i18n/locales/az.ts
index be10fe04db..299ca1c49a 100644
--- a/apps/desktop/src/i18n/locales/az.ts
+++ b/apps/desktop/src/i18n/locales/az.ts
@@ -733,6 +733,8 @@ export default withEnglishFallback({
     redisTlsInsecure: "Sertifikat yoxlamasını ötür",
     redisTlsInsecureHint: "Öz imzalı sertifikatlar və ya özəl CA-lar üçün redis-cli --tls --insecure əmrinə bərabərdir.",
     mysqlTlsMode: "TLS rejimi",
+    firebirdCharset: "Simvol dəsti",
+    firebirdCharsetHint: "CHARACTER SET NONE sütunlarında saxlanan mətni (məsələn, GBK ilə saxlanmış köhnə Çin məlumatları) deşifrə edir. Mətn pozulmuş görünürsə, məlumatın faktiki kodlaşdırmasını seçin.",
     mysqlTlsModePreferred: "Üstün tutulan",
     mysqlTlsModeDisabled: "Deaktiv",
     mysqlTlsModeRequired: "Tələb olunur",
diff --git a/apps/desktop/src/i18n/locales/en.ts b/apps/desktop/src/i18n/locales/en.ts
index afe148d379..729241df2d 100644
--- a/apps/desktop/src/i18n/locales/en.ts
+++ b/apps/desktop/src/i18n/locales/en.ts
@@ -1020,6 +1020,8 @@ export default {
     redisTlsInsecure: "Skip certificate verification",
     redisTlsInsecureHint: "Equivalent to redis-cli --tls --insecure, for self-signed certificates or private CAs.",
     mysqlTlsMode: "TLS Mode",
+    firebirdCharset: "Charset",
+    firebirdCharsetHint: "Decodes text stored in CHARACTER SET NONE columns (for example legacy Chinese data saved as GBK). Pick the actual data encoding when text appears garbled.",
     mysqlTlsModePreferred: "Preferred",
     mysqlTlsModeDisabled: "Disabled",
     mysqlTlsModeRequired: "Required",
diff --git a/apps/desktop/src/i18n/locales/es.ts b/apps/desktop/src/i18n/locales/es.ts
index 046a8b40ce..b52d19ae72 100644
--- a/apps/desktop/src/i18n/locales/es.ts
+++ b/apps/desktop/src/i18n/locales/es.ts
@@ -992,6 +992,8 @@ export default withEnglishFallback({
     redisTlsInsecure: "Omitir verificación del certificado",
     redisTlsInsecureHint: "Equivale a redis-cli --tls --insecure, para certificados autofirmados o CA privadas.",
     mysqlTlsMode: "Modo TLS",
+    firebirdCharset: "Juego de caracteres",
+    firebirdCharsetHint: "Decodifica el texto almacenado en columnas CHARACTER SET NONE (por ejemplo, datos chinos antiguos guardados como GBK). Elige la codificación real de los datos cuando el texto aparezca mal.",
     mysqlTlsModePreferred: "Preferido",
     mysqlTlsModeDisabled: "Deshabilitado",
     mysqlTlsModeRequired: "Requerido",
diff --git a/apps/desktop/src/i18n/locales/id.ts b/apps/desktop/src/i18n/locales/id.ts
index 83a2e38a64..4f7ebbfaef 100644
--- a/apps/desktop/src/i18n/locales/id.ts
+++ b/apps/desktop/src/i18n/locales/id.ts
@@ -958,6 +958,8 @@ export default withEnglishFallback({
     redisTlsInsecure: "Lewati verifikasi sertifikat",
     redisTlsInsecureHint: "Setara dengan redis-cli --tls --insecure, untuk sertifikat self-signed atau CA privat.",
     mysqlTlsMode: "Mode TLS",
+    firebirdCharset: "Charset",
+    firebirdCharsetHint: "Mendekode teks yang disimpan di kolom CHARACTER SET NONE (misalnya data bahasa Mandarin lama yang disimpan sebagai GBK). Pilih pengodean data yang sebenarnya saat teks tampak rusak.",
     mysqlTlsModePreferred: "Preferred",
     mysqlTlsModeDisabled: "Dinonaktifkan",
     mysqlTlsModeRequired: "Wajib",
diff --git a/apps/desktop/src/i18n/locales/it.ts b/apps/desktop/src/i18n/locales/it.ts
index 97ae2a6ad7..0cfba2fb1a 100644
--- a/apps/desktop/src/i18n/locales/it.ts
+++ b/apps/desktop/src/i18n/locales/it.ts
@@ -915,6 +915,8 @@ export default withEnglishFallback({
     redisTlsInsecure: "Salta verifica certificato",
     redisTlsInsecureHint: "Equivalente a redis-cli --tls --insecure, per certificati auto-firmati o CA private.",
     mysqlTlsMode: "Modalità TLS",
+    firebirdCharset: "Set di caratteri",
+    firebirdCharsetHint: "Decodifica il testo memorizzato nelle colonne CHARACTER SET NONE (ad esempio dati cinesi legacy salvati come GBK). Scegli la codifica effettiva dei dati quando il testo appare illeggibile.",
     mysqlTlsModePreferred: "Preferita",
     mysqlTlsModeDisabled: "Disabilitata",
     mysqlTlsModeRequired: "Richiesta",
diff --git a/apps/desktop/src/i18n/locales/ja.ts b/apps/desktop/src/i18n/locales/ja.ts
index f198a44adf..be8acdc31f 100644
--- a/apps/desktop/src/i18n/locales/ja.ts
+++ b/apps/desktop/src/i18n/locales/ja.ts
@@ -915,6 +915,8 @@ export default withEnglishFallback({
     redisTlsInsecure: "証明書の検証をスキップ",
     redisTlsInsecureHint: "自己署名証明書やプライベートCA用の、redis-cli --tls --insecure 相当の設定です。",
     mysqlTlsMode: "TLSモード",
+    firebirdCharset: "文字セット",
+    firebirdCharsetHint: "CHARACTER SET NONE の列に格納されたテキスト（例: GBK で保存された中国語の旧データ）をデコードします。文字化けする場合はデータの実際のエンコーディングを選択してください。",
     mysqlTlsModePreferred: "優先",
     mysqlTlsModeDisabled: "無効",
     mysqlTlsModeRequired: "必須",
diff --git a/apps/desktop/src/i18n/locales/ko.ts b/apps/desktop/src/i18n/locales/ko.ts
index cff83151ee..05ca95f731 100644
--- a/apps/desktop/src/i18n/locales/ko.ts
+++ b/apps/desktop/src/i18n/locales/ko.ts
@@ -950,6 +950,8 @@ export default withEnglishFallback({
     redisTlsInsecure: "인증서 검증 건너뛰기",
     redisTlsInsecureHint: "redis-cli --tls --insecure과 동일하며, 자체 서명 인증서나 사설 CA용입니다.",
     mysqlTlsMode: "TLS 모드",
+    firebirdCharset: "문자 집합",
+    firebirdCharsetHint: "CHARACTER SET NONE 열에 저장된 텍스트(예: GBK로 저장된 예전 중국어 데이터)를 디코딩합니다. 텍스트가 깨져 보이면 데이터의 실제 인코딩을 선택하세요.",
     mysqlTlsModePreferred: "선호",
     mysqlTlsModeDisabled: "비활성화",
     mysqlTlsModeRequired: "필수",
diff --git a/apps/desktop/src/i18n/locales/pt-BR.ts b/apps/desktop/src/i18n/locales/pt-BR.ts
index 8aae7086d9..c7bdb0a7e4 100644
--- a/apps/desktop/src/i18n/locales/pt-BR.ts
+++ b/apps/desktop/src/i18n/locales/pt-BR.ts
@@ -916,6 +916,8 @@ export default withEnglishFallback({
     redisTlsInsecure: "Ignorar verificação de certificado",
     redisTlsInsecureHint: "Equivalente a redis-cli --tls --insecure, para certificados autoassinados ou CAs privadas.",
     mysqlTlsMode: "Modo TLS",
+    firebirdCharset: "Conjunto de caracteres",
+    firebirdCharsetHint: "Decodifica textos armazenados em colunas CHARACTER SET NONE (por exemplo, dados em chinês antigos salvos como GBK). Escolha a codificação real dos dados quando o texto aparecer corrompido.",
     mysqlTlsModePreferred: "Preferencial",
     mysqlTlsModeDisabled: "Desabilitado",
     mysqlTlsModeRequired: "Obrigatório",
diff --git a/apps/desktop/src/i18n/locales/ru.ts b/apps/desktop/src/i18n/locales/ru.ts
index 4e2c064ba7..c7d009b254 100644
--- a/apps/desktop/src/i18n/locales/ru.ts
+++ b/apps/desktop/src/i18n/locales/ru.ts
@@ -931,6 +931,8 @@ export default withEnglishFallback({
     redisTlsInsecure: "Пропускать проверку сертификата",
     redisTlsInsecureHint: "Эквивалентно redis-cli --tls --insecure, для самоподписанных сертификатов или частных CA.",
     mysqlTlsMode: "Режим TLS",
+    firebirdCharset: "Кодировка",
+    firebirdCharsetHint: "Декодирует текст в столбцах CHARACTER SET NONE (например, старые китайские данные в кодировке GBK). Если текст отображается некорректно, выберите фактическую кодировку данных.",
     mysqlTlsModePreferred: "Предпочтительный",
     mysqlTlsModeDisabled: "Отключено",
     mysqlTlsModeRequired: "Обязательный",
diff --git a/apps/desktop/src/i18n/locales/tr.ts b/apps/desktop/src/i18n/locales/tr.ts
index 44e7fc139c..952f6efa9a 100644
--- a/apps/desktop/src/i18n/locales/tr.ts
+++ b/apps/desktop/src/i18n/locales/tr.ts
@@ -733,6 +733,8 @@ export default withEnglishFallback({
     redisTlsInsecure: "Sertifika doğrulamasını atla",
     redisTlsInsecureHint: "redis-cli --tls --insecure ile eşdeğerdir; kendinden imzalı sertifikalar veya özel CA'lar içindir.",
     mysqlTlsMode: "TLS Modu",
+    firebirdCharset: "Karakter kümesi",
+    firebirdCharsetHint: "CHARACTER SET NONE sütunlarında saklanan metni çözer (örneğin GBK olarak kaydedilmiş eski Çince veriler). Metin bozuk göründüğünde verinin gerçek kodlamasını seçin.",
     mysqlTlsModePreferred: "Tercih edilen",
     mysqlTlsModeDisabled: "Devre dışı",
     mysqlTlsModeRequired: "Zorunlu",
diff --git a/apps/desktop/src/i18n/locales/zh-CN.ts b/apps/desktop/src/i18n/locales/zh-CN.ts
index 6a0d135434..aa6651c421 100644
--- a/apps/desktop/src/i18n/locales/zh-CN.ts
+++ b/apps/desktop/src/i18n/locales/zh-CN.ts
@@ -956,6 +956,8 @@ export default withEnglishFallback({
     redisTlsInsecure: "跳过证书验证",
     redisTlsInsecureHint: "等价于 redis-cli --tls --insecure，适用于自签名证书或私有 CA。",
     mysqlTlsMode: "TLS 模式",
+    firebirdCharset: "连接字符集",
+    firebirdCharsetHint: "用于解码 CHARACTER SET NONE 字段中的文本（例如旧库以 GBK 存放的中文）。文本出现乱码时，请按数据的实际编码选择。",
     mysqlTlsModePreferred: "优先使用",
     mysqlTlsModeDisabled: "禁用",
     mysqlTlsModeRequired: "必须使用",
diff --git a/apps/desktop/src/i18n/locales/zh-TW.ts b/apps/desktop/src/i18n/locales/zh-TW.ts
index f9a0b60daf..29fd54c473 100644
--- a/apps/desktop/src/i18n/locales/zh-TW.ts
+++ b/apps/desktop/src/i18n/locales/zh-TW.ts
@@ -920,6 +920,8 @@ export default withEnglishFallback({
     redisTlsInsecure: "跳過憑證驗證",
     redisTlsInsecureHint: "等價於 redis-cli --tls --insecure，適用於自簽名憑證或私有 CA。",
     mysqlTlsMode: "TLS 模式",
+    firebirdCharset: "連線字元集",
+    firebirdCharsetHint: "用於解碼 CHARACTER SET NONE 欄位中的文字（例如舊資料庫以 GBK 儲存的中文）。文字出現亂碼時，請依資料的實際編碼選擇。",
     mysqlTlsModePreferred: "優先使用",
     mysqlTlsModeDisabled: "停用",
     mysqlTlsModeRequired: "必須使用",
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