diff --git a/packages/core/src/__tests__/client.test.ts b/packages/core/src/__tests__/client.test.ts
index dcd4d57..b2d4d77 100644
--- a/packages/core/src/__tests__/client.test.ts
+++ b/packages/core/src/__tests__/client.test.ts
@@ -1,7 +1,8 @@
 import { describe, it, expect, beforeAll, afterAll } from 'vitest';
 import http from 'node:http';
 import { VisionLClient } from '../client.js';
-import type { ApiResponse, PageInfo } from '../types/api.js';
+import type { ApiResponse } from '../types/api.js';
+import type { PageInfo } from '../types/page.js';
 
 function createMockServer() {
   const server = http.createServer((req, res) => {
diff --git a/packages/core/src/client.ts b/packages/core/src/client.ts
index beed1b2..761ac51 100644
--- a/packages/core/src/client.ts
+++ b/packages/core/src/client.ts
@@ -1,4 +1,5 @@
-import type { ApiResponse, PageInfo } from './types/api.js';
+import type { ApiResponse } from './types/api.js';
+import type { PageInfo } from './types/page.js';
 
 export class VisionLClient {
   constructor(private baseUrl: string) {}
diff --git a/packages/daemon/src/__tests__/browser-manager.test.ts b/packages/daemon/src/__tests__/browser-manager.test.ts
new file mode 100644
index 0000000..ee26057
--- /dev/null
+++ b/packages/daemon/src/__tests__/browser-manager.test.ts
@@ -0,0 +1,140 @@
+// Integration tests for BrowserManager — requires Playwright + Chromium / 浏览器管理器集成测试，需要 Playwright 和 Chromium
+import { describe, it, expect } from 'vitest';
+import type { FingerprintProfile } from '@visionl/core';
+import { BrowserManager } from '../browser-manager.js';
+
+const integration = process.env.VISIONL_INTEGRATION === '1' ? describe : describe.skip;
+
+const defaultProfile: FingerprintProfile = {
+  id: 'fp_test',
+  name: 'Test Profile',
+  userAgent: 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36',
+  platform: 'Win32',
+  languages: ['en-US', 'en'],
+  acceptLanguage: 'en-US,en;q=0.9',
+  screen: { width: 1920, height: 1080, colorDepth: 24, pixelRatio: 1 },
+  viewport: { width: 1280, height: 720 },
+  webgl: { vendor: 'Google Inc.', renderer: 'ANGLE (NVIDIA GeForce RTX 3060)' },
+  timezone: 'America/New_York',
+  geolocation: { latitude: 40.7128, longitude: -74.006, accuracy: 10 },
+  permissions: {
+    notifications: 'denied',
+    geolocation: 'granted',
+    camera: 'denied',
+    microphone: 'denied',
+  },
+  behavior: {
+    mouseMoveDelay: { min: 50, max: 150 },
+    keyPressDelay: { min: 80, max: 200 },
+    scrollStepDelay: { min: 30, max: 100 },
+  },
+  canvasNoise: { enabled: true, strength: 0.5 },
+};
+
+integration('BrowserManager', () => {
+  let manager: BrowserManager;
+
+  it('init launches browser without error', async () => {
+    manager = new BrowserManager(defaultProfile);
+    await manager.init();
+
+    // Verify browser reports pages
+    const pages = manager.listPages();
+    expect(Array.isArray(pages)).toBe(true);
+
+    await manager.cleanup();
+  });
+
+  it('createPage opens a URL and returns PageInfo', async () => {
+    manager = new BrowserManager(defaultProfile);
+    await manager.init();
+
+    const info = await manager.createPage('https://example.com', 'example');
+    expect(info.id).toMatch(/^p_/);
+    expect(info.url).toBe('https://example.com');
+    expect(info.alias).toBe('example');
+    expect(info.status).toBe('active');
+    expect(info.profile).toBe('fp_test');
+    expect(info.title).toBeTruthy();
+
+    await manager.cleanup();
+  });
+
+  it('getPage returns page by id and alias', async () => {
+    manager = new BrowserManager(defaultProfile);
+    await manager.init();
+
+    const info = await manager.createPage('https://example.com', 'home');
+    const byId = manager.getPage(info.id);
+    const byAlias = manager.getPage('home');
+
+    expect(byId).toBeDefined();
+    expect(byAlias).toBeDefined();
+    expect(byId!.info.id).toBe(byAlias!.info.id);
+
+    await manager.cleanup();
+  });
+
+  it('closePage removes the page', async () => {
+    manager = new BrowserManager(defaultProfile);
+    await manager.init();
+
+    const info = await manager.createPage('https://example.com');
+    expect(manager.listPages()).toHaveLength(1);
+
+    await manager.closePage(info.id);
+    expect(manager.listPages()).toHaveLength(0);
+    expect(manager.getPage(info.id)).toBeUndefined();
+
+    await manager.cleanup();
+  });
+
+  it('createPage with duplicate alias throws', async () => {
+    manager = new BrowserManager(defaultProfile);
+    await manager.init();
+
+    await manager.createPage('https://example.com', 'dup');
+    await expect(
+      manager.createPage('https://other.com', 'dup')
+    ).rejects.toThrow(/already exists/);
+
+    await manager.cleanup();
+  });
+
+  it('createPage with invalid URL throws', async () => {
+    manager = new BrowserManager(defaultProfile);
+    await manager.init();
+
+    await expect(
+      manager.createPage('not-a-valid-url')
+    ).rejects.toThrow(/Invalid URL/);
+
+    await manager.cleanup();
+  });
+
+  it('closePage with unknown id throws PAGE_NOT_FOUND', async () => {
+    manager = new BrowserManager(defaultProfile);
+    await manager.init();
+
+    await expect(
+      manager.closePage('nonexistent')
+    ).rejects.toThrow(/not found/);
+
+    await manager.cleanup();
+  });
+
+  it('cleanup closes all pages and browser', async () => {
+    manager = new BrowserManager(defaultProfile);
+    await manager.init();
+
+    await manager.createPage('https://example.com');
+    await manager.createPage('https://httpbin.org/get');
+    expect(manager.listPages()).toHaveLength(2);
+
+    await manager.cleanup();
+    expect(manager.listPages()).toHaveLength(0);
+
+    // Should not throw — can call cleanup multiple times
+    await manager.cleanup();
+  });
+});
diff --git a/packages/daemon/src/__tests__/page-registry.test.ts b/packages/daemon/src/__tests__/page-registry.test.ts
new file mode 100644
index 0000000..14a9ba4
--- /dev/null
+++ b/packages/daemon/src/__tests__/page-registry.test.ts
@@ -0,0 +1,113 @@
+// unit tests for PageRegistry — no Playwright browser required / 页面注册表单元测试，无需 Playwright 浏览器
+import { describe, it, expect, beforeEach } from 'vitest';
+import type { PageInfo } from '@visionl/core';
+import { PageRegistry, type RegisteredPage } from '../page-registry.js';
+
+function makeInfo(overrides: Partial<PageInfo> = {}): PageInfo {
+  return {
+    id: 'p_test1',
+    url: 'https://example.com',
+    title: 'Example',
+    status: 'active',
+    profile: 'fp_default',
+    ...overrides,
+  };
+}
+
+function makeMockPage() {
+  return {
+    url: () => 'https://example.com',
+    title: () => Promise.resolve('Example'),
+    close: () => Promise.resolve(),
+  } as any;
+}
+
+function makeMockContext() {
+  return {
+    close: () => Promise.resolve(),
+    newPage: () => Promise.resolve(makeMockPage()),
+  } as any;
+}
+
+describe('PageRegistry', () => {
+  let registry: PageRegistry;
+
+  beforeEach(() => {
+    registry = new PageRegistry();
+  });
+
+  it('add stores entry and can be retrieved via get', () => {
+    const info = makeInfo();
+    const page = makeMockPage();
+    const context = makeMockContext();
+
+    registry.add(info, page, context);
+
+    const entry = registry.get('p_test1');
+    expect(entry).toBeDefined();
+    expect(entry!.info).toEqual(info);
+    expect(entry!.page).toBe(page);
+    expect(entry!.context).toBe(context);
+  });
+
+  it('add with alias makes it findable by alias', () => {
+    const info = makeInfo({ alias: 'home' });
+    const page = makeMockPage();
+    const context = makeMockContext();
+
+    registry.add(info, page, context);
+
+    const entry = registry.findByIdOrAlias('home');
+    expect(entry).toBeDefined();
+    expect(entry!.info.id).toBe('p_test1');
+  });
+
+  it('add with alias records hasAlias as true', () => {
+    const info = makeInfo({ alias: 'home' });
+    registry.add(info, makeMockPage(), makeMockContext());
+
+    expect(registry.hasAlias('home')).toBe(true);
+    expect(registry.hasAlias('nonexistent')).toBe(false);
+  });
+
+  it('findByIdOrAlias works with direct id', () => {
+    const info = makeInfo();
+    registry.add(info, makeMockPage(), makeMockContext());
+
+    const entry = registry.findByIdOrAlias('p_test1');
+    expect(entry).toBeDefined();
+    expect(entry!.info.title).toBe('Example');
+  });
+
+  it('findByIdOrAlias returns undefined for unknown id or alias', () => {
+    expect(registry.findByIdOrAlias('unknown')).toBeUndefined();
+  });
+
+  it('remove deletes the entry and its alias, returns true', () => {
+    const info = makeInfo({ alias: 'home' });
+    registry.add(info, makeMockPage(), makeMockContext());
+
+    const result = registry.remove('p_test1');
+    expect(result).toBe(true);
+    expect(registry.get('p_test1')).toBeUndefined();
+    expect(registry.hasAlias('home')).toBe(false);
+    expect(registry.findByIdOrAlias('home')).toBeUndefined();
+  });
+
+  it('remove returns false for non-existent id', () => {
+    const result = registry.remove('no-such-id');
+    expect(result).toBe(false);
+  });
+
+  it('list returns all page infos', () => {
+    const a = makeInfo({ id: 'p_a', url: 'https://a.com' });
+    const b = makeInfo({ id: 'p_b', url: 'https://b.com' });
+
+    registry.add(a, makeMockPage(), makeMockContext());
+    registry.add(b, makeMockPage(), makeMockContext());
+
+    const pages = registry.list();
+    expect(pages).toHaveLength(2);
+    expect(pages.map((p) => p.id)).toEqual(expect.arrayContaining(['p_a', 'p_b']));
+  });
+});
diff --git a/packages/daemon/src/browser-manager.ts b/packages/daemon/src/browser-manager.ts
new file mode 100644
index 0000000..0d26113
--- /dev/null
+++ b/packages/daemon/src/browser-manager.ts
@@ -0,0 +1,102 @@
+// BrowserManager — Playwright browser lifecycle and page management with stealth plugin / 浏览器管理器，使用隐身插件管理 Playwright 浏览器生命周期和页面
+import { chromium } from 'playwright-extra';
+import StealthPlugin from 'puppeteer-extra-plugin-stealth';
+import type { Browser, BrowserContext, Page } from 'playwright';
+import type { FingerprintProfile, PageInfo } from '@visionl/core';
+import { PageRegistry } from './page-registry.js';
+
+// Apply stealth plugin once at module level / 模块级别一次性注入隐身插件
+chromium.use(StealthPlugin());
+
+function generatePageId(): string {
+  const hex = Math.random().toString(16).slice(2, 10);
+  return `p_${hex}`;
+}
+
+export class BrowserManager {
+  private browser: Browser | null = null;
+  private registry = new PageRegistry();
+  private profile: FingerprintProfile;
+
+  constructor(profile: FingerprintProfile) {
+    this.profile = profile;
+  }
+
+  async init(): Promise<void> {
+    this.browser = await chromium.launch({
+      headless: true,
+      args: [
+        '--no-sandbox',
+        '--disable-setuid-sandbox',
+        '--disable-blink-features=AutomationControlled',
+      ],
+    });
+  }
+
+  async createPage(url: string, alias?: string): Promise<PageInfo> {
+    if (!this.browser) throw new Error('Browser not initialized');
+
+    if (alias && this.registry.hasAlias(alias)) {
+      throw Object.assign(new Error(`Alias "${alias}" already exists`), { code: 'ALIAS_EXISTS' });
+    }
+
+    // Validate URL format / 验证 URL 格式
+    try {
+      new URL(url);
+    } catch {
+      throw Object.assign(new Error(`Invalid URL: ${url}`), { code: 'INVALID_URL' });
+    }
+
+    const context = await this.browser.newContext({
+      viewport: this.profile.viewport,
+      userAgent: this.profile.userAgent,
+      locale: this.profile.languages[0],
+      timezoneId: this.profile.timezone,
+      permissions: Object.entries(this.profile.permissions)
+        .filter(([, v]) => v === 'granted')
+        .map(([k]) => k as any),
+      geolocation: this.profile.geolocation,
+      colorScheme: 'light',
+      deviceScaleFactor: this.profile.screen.pixelRatio,
+    });
+
+    const page = await context.newPage();
+    await page.goto(url, { waitUntil: 'domcontentloaded', timeout: 30000 });
+    const title = await page.title();
+
+    const id = generatePageId();
+    const info: PageInfo = { id, url, alias, title, status: 'active', profile: this.profile.id };
+    this.registry.add(info, page, context);
+
+    return info;
+  }
+
+  async closePage(idOrAlias: string): Promise<void> {
+    const entry = this.registry.findByIdOrAlias(idOrAlias);
+    if (!entry) {
+      throw Object.assign(new Error(`Page "${idOrAlias}" not found`), { code: 'PAGE_NOT_FOUND' });
+    }
+    await entry.context.close();
+    this.registry.remove(entry.info.id);
+  }
+
+  getPage(idOrAlias: string) {
+    return this.registry.findByIdOrAlias(idOrAlias);
+  }
+
+  listPages(): PageInfo[] {
+    return this.registry.list();
+  }
+
+  async cleanup(): Promise<void> {
+    // Close all contexts / 关闭所有上下文
+    const entries = this.registry['pages']?.values() ?? [];
+    for (const entry of entries) {
+      try { await entry.context.close(); } catch { /* ignore / 忽略 */ }
+    }
+    if (this.browser) {
+      await this.browser.close();
+      this.browser = null;
+    }
+  }
+}
diff --git a/packages/daemon/src/page-registry.ts b/packages/daemon/src/page-registry.ts
new file mode 100644
index 0000000..8626d78
--- /dev/null
+++ b/packages/daemon/src/page-registry.ts
@@ -0,0 +1,48 @@
+// PageRegistry — tracks active Playwright pages by ID and alias / 页面注册表，通过 ID 和别名追踪活跃页面
+import type { Page, BrowserContext } from 'playwright';
+import type { PageInfo } from '@visionl/core';
+
+export interface RegisteredPage {
+  info: PageInfo;
+  page: Page;
+  context: BrowserContext;
+}
+
+export class PageRegistry {
+  private pages = new Map<string, RegisteredPage>();
+  private aliasMap = new Map<string, string>(); // alias → id
+
+  add(info: PageInfo, page: Page, context: BrowserContext): void {
+    this.pages.set(info.id, { info, page, context });
+    if (info.alias) {
+      this.aliasMap.set(info.alias, info.id);
+    }
+  }
+
+  remove(id: string): boolean {
+    const entry = this.pages.get(id);
+    if (!entry) return false;
+    if (entry.info.alias) {
+      this.aliasMap.delete(entry.info.alias);
+    }
+    return this.pages.delete(id);
+  }
+
+  get(id: string): RegisteredPage | undefined {
+    return this.pages.get(id);
+  }
+
+  findByIdOrAlias(idOrAlias: string): RegisteredPage | undefined {
+    const id = this.aliasMap.get(idOrAlias);
+    if (id) return this.pages.get(id);
+    return this.pages.get(idOrAlias);
+  }
+
+  list(): PageInfo[] {
+    return Array.from(this.pages.values()).map((entry) => entry.info);
+  }
+
+  hasAlias(alias: string): boolean {
+    return this.aliasMap.has(alias);
+  }
+}