diff --git a/browser/src/components/device-modal/serial-port.tsx b/browser/src/components/device-modal/serial-port.tsx
index b03247b5..294076d5 100644
--- a/browser/src/components/device-modal/serial-port.tsx
+++ b/browser/src/components/device-modal/serial-port.tsx
@@ -1,10 +1,11 @@
-import { useEffect } from 'react';
+import { useEffect, useRef } from 'react';
 import { Button } from 'antd';
 import { useAtom } from 'jotai';
 import { useTranslation } from 'react-i18next';
 
 import { serialStateAtom } from '@/jotai/device.ts';
 import { device } from '@/libs/device';
+import * as storage from '@/libs/storage';
 
 type SerialPortProps = {
   onDisconnect: () => void;
@@ -15,23 +16,64 @@ export const SerialPort = ({ setErrMsg, onDisconnect }: SerialPortProps) => {
   const { t } = useTranslation();
 
   const [serialState, setSerialState] = useAtom(serialStateAtom);
+  const autoConnectAttempted = useRef(false);
 
   useEffect(() => {
     const isWebSerialSupported = 'serial' in navigator;
     if (!isWebSerialSupported) {
       setSerialState('notSupported');
+      return;
+    }
+
+    if (!autoConnectAttempted.current) {
+      autoConnectAttempted.current = true;
+      tryAutoConnect();
     }
   }, [setSerialState]);
 
+  async function tryAutoConnect() {
+    const savedPort = storage.getSerialPort();
+    if (!savedPort) return;
+
+    try {
+      const grantedPorts = await navigator.serial.getPorts();
+      const match = grantedPorts.find((port) => {
+        const info = port.getInfo();
+        return (
+          savedPort.vendorId != null &&
+          savedPort.productId != null &&
+          info.usbVendorId === savedPort.vendorId &&
+          info.usbProductId === savedPort.productId
+        );
+      });
+
+      if (match) {
+        setSerialState('connecting');
+        await device.serialPort.init({ port: match, onDisconnect });
+        setSerialState('connected');
+      }
+    } catch (err) {
+      console.log('Auto-connect serial failed:', err);
+    }
+  }
+
   const selectSerialPort = async () => {
     if (serialState === 'connecting') return;
     setSerialState('connecting');
     setErrMsg('');
 
     try {
-      const port = await navigator.serial.requestPort();
+      const savedPort = storage.getSerialPort();
+      const filters = savedPort?.vendorId != null
+        ? [{ usbVendorId: savedPort.vendorId, usbProductId: savedPort.productId }]
+        : [];
+
+      const port = await navigator.serial.requestPort(filters.length ? { filters } : undefined);
       await device.serialPort.init({ port, onDisconnect });
 
+      const info = port.getInfo();
+      storage.setSerialPort(info.usbVendorId, info.usbProductId);
+
       setSerialState('connected');
     } catch (err) {
       console.log(err);
diff --git a/browser/src/components/device-modal/video.tsx b/browser/src/components/device-modal/video.tsx
index 90e7c218..b7132c67 100644
--- a/browser/src/components/device-modal/video.tsx
+++ b/browser/src/components/device-modal/video.tsx
@@ -1,4 +1,4 @@
-import { useEffect, useState } from 'react';
+import { useEffect, useRef, useState } from 'react';
 import { Select } from 'antd';
 import { useAtom, useAtomValue } from 'jotai';
 import { useTranslation } from 'react-i18next';
@@ -20,6 +20,7 @@ export const Video = ({ setErrMsg }: VideoProps) => {
   const [videoState, setVideoState] = useAtom(videoStateAtom);
 
   const [devices, setDevices] = useState<MediaDevice[]>([]);
+  const autoSelectAttempted = useRef(false);
 
   useEffect(() => {
     getDevices();
@@ -51,13 +52,21 @@ export const Video = ({ setErrMsg }: VideoProps) => {
       });
 
       setDevices(mediaDevices);
+
+      if (!autoSelectAttempted.current) {
+        autoSelectAttempted.current = true;
+        const savedDeviceId = storage.getVideoDevice();
+        if (savedDeviceId && mediaDevices.some((d) => d.videoId === savedDeviceId)) {
+          selectVideoDevice(savedDeviceId, mediaDevices);
+        }
+      }
     } catch (err) {
       console.log(err);
       setErrMsg(t('camera.failed'));
     }
   }
 
-  async function selectVideo(videoId: string) {
+  async function selectVideoDevice(videoId: string, deviceList: MediaDevice[]) {
     if (videoState === 'connecting') return;
 
     if (!videoId) {
@@ -65,7 +74,7 @@ export const Video = ({ setErrMsg }: VideoProps) => {
       return;
     }
 
-    const device = devices.find((d) => d.videoId === videoId);
+    const device = deviceList.find((d) => d.videoId === videoId);
     if (!device) {
       return;
     }
@@ -90,6 +99,10 @@ export const Video = ({ setErrMsg }: VideoProps) => {
     storage.setVideoDevice(videoId);
   }
 
+  async function selectVideo(videoId: string) {
+    return selectVideoDevice(videoId, devices);
+  }
+
   return (
     <Select
       value={videoDeviceId || undefined}
diff --git a/browser/src/components/menu/serial-port/index.tsx b/browser/src/components/menu/serial-port/index.tsx
index 425e688b..16bcb009 100644
--- a/browser/src/components/menu/serial-port/index.tsx
+++ b/browser/src/components/menu/serial-port/index.tsx
@@ -2,6 +2,7 @@ import { useState } from 'react';
 import { CpuIcon, Loader2Icon } from 'lucide-react';
 
 import { device } from '@/libs/device';
+import * as storage from '@/libs/storage';
 
 export const SerialPort = () => {
   const [isLoading, setIsLoading] = useState(false);
@@ -13,6 +14,9 @@ export const SerialPort = () => {
     try {
       const port = await navigator.serial.requestPort();
       await device.serialPort.init({ port });
+
+      const info = port.getInfo();
+      storage.setSerialPort(info.usbVendorId, info.usbProductId);
     } finally {
       setIsLoading(false);
     }
diff --git a/browser/src/jotai/device.ts b/browser/src/jotai/device.ts
index ed6c4754..dfaa172e 100644
--- a/browser/src/jotai/device.ts
+++ b/browser/src/jotai/device.ts
@@ -10,7 +10,7 @@ export const resolutionAtom = atom<Resolution>({
   height: 1080
 });
 
-export const videoScaleAtom = atom<number>(1.0);
+export const videoScaleAtom = atom<number>(0);
 
 export const videoRotationAtom = atom<Rotation>(0);
 
diff --git a/browser/src/libs/storage/index.ts b/browser/src/libs/storage/index.ts
index 7583d973..fe19ef57 100644
--- a/browser/src/libs/storage/index.ts
+++ b/browser/src/libs/storage/index.ts
@@ -12,6 +12,7 @@ const MOUSE_MODE_KEY = 'nanokvm-usb-mouse-mode';
 const MOUSE_SCROLL_DIRECTION_KEY = 'nanokvm-usb-mouse-scroll-direction';
 const MOUSE_SCROLL_INTERVAL_KEY = 'nanokvm-usb-mouse-scroll-interval';
 const MOUSE_JIGGLER_MODE_KEY = 'nanokvm-usb-mouse-jiggler-mode';
+const SERIAL_PORT_KEY = 'nanokvm-usb-serial-port';
 const KEYBOARD_SHORTCUT_KEY = 'nanokvm-usb-keyboard-shortcut';
 
 export function getLanguage() {
@@ -155,3 +156,26 @@ export function getMouseJigglerMode(): 'enable' | 'disable' {
 export function setMouseJigglerMode(jiggler: 'enable' | 'disable'): void {
   localStorage.setItem(MOUSE_JIGGLER_MODE_KEY, jiggler);
 }
+
+export type SerialPortInfo = {
+  vendorId?: number;
+  productId?: number;
+};
+
+export function getSerialPort(): SerialPortInfo | null {
+  const data = localStorage.getItem(SERIAL_PORT_KEY);
+  if (!data) return null;
+  try {
+    return window.JSON.parse(data) as SerialPortInfo;
+  } catch {
+    return null;
+  }
+}
+
+export function setSerialPort(vendorId?: number, productId?: number): void {
+  localStorage.setItem(SERIAL_PORT_KEY, window.JSON.stringify({ vendorId, productId }));
+}
+
+export function removeSerialPort(): void {
+  localStorage.removeItem(SERIAL_PORT_KEY);
+}