Playwright vs Selenium for Cross-Browser Testing in 2025

Selenium has been the dominant tool for cross-browser testing for over 15 years. Playwright launched in 2020 and has rapidly taken market share, particularly for new projects. Both support Chrome, Firefox, and Safari — but they differ significantly in architecture, speed, reliability, and developer experience.

This is a practical comparison focused on cross-browser testing specifically, not general browser automation.

Architecture: Why It Matters

Selenium uses WebDriver — a standardized HTTP API that sends commands to a browser driver (ChromeDriver, GeckoDriver, SafariDriver). Each command is an HTTP request: click, type, find element. The browser is a separate process controlled via a REST API.

Playwright uses the Chrome DevTools Protocol (CDP) for Chromium-based browsers, and custom protocols for Firefox and WebKit. Communication is via WebSocket, not HTTP, and multiple commands can be pipelined. The browser is bundled with Playwright — you don't manage drivers separately.

This architectural difference explains almost all the practical differences between the two tools.

Browser Support Comparison

The key difference: Playwright bundles its own browser builds. You run playwright install and get exactly the browser versions Playwright was tested against. With Selenium, you manage browser and driver version compatibility yourself — a frequent source of CI failures when Chrome auto-updates.

Speed

Playwright is significantly faster than Selenium for most test scenarios:

Session startup:

• Playwright: 100-500ms to launch a browser context
• Selenium: 1-3 seconds to start a WebDriver session

Command execution:

• Playwright: WebSocket, low latency, pipelining
• Selenium: HTTP request per command, ~50-100ms per command

Auto-waiting:

• Playwright: built-in smart waiting — automatically waits for elements to be actionable
• Selenium: explicit waits required (WebDriverWait) — forgetting them causes flaky tests

A typical Playwright test suite runs 2-5x faster than an equivalent Selenium suite. For large suites, this is the difference between a 10-minute and a 30-minute CI run.

Cross-Browser Test Example

Same test in both tools:

# Playwright (Python)
from playwright.sync_api import sync_playwright

def test_login_flow(playwright):
    for browser_type in [playwright.chromium, playwright.firefox, playwright.webkit]:
        browser = browser_type.launch()
        page = browser.new_page()
        
        page.goto("https://app.example.com/login")
        page.fill("[name='email']", "test@example.com")
        page.fill("[name='password']", "password123")
        page.click("[type='submit']")
        
        page.wait_for_url("**/dashboard")
        assert "/dashboard" in page.url
        
        browser.close()

# Selenium (Python)
from selenium import webdriver
from selenium.webdriver.common.by import By
from selenium.webdriver.support.wait import WebDriverWait
from selenium.webdriver.support import expected_conditions as EC

def test_login_flow():
    browsers = [
        webdriver.Chrome(),
        webdriver.Firefox(),
        webdriver.Safari(),  # Requires safaridriver setup
    ]
    
    for driver in browsers:
        try:
            driver.get("https://app.example.com/login")
            
            WebDriverWait(driver, 10).until(
                EC.presence_of_element_located((By.NAME, "email"))
            ).send_keys("test@example.com")
            
            driver.find_element(By.NAME, "password").send_keys("password123")
            driver.find_element(By.CSS_SELECTOR, "[type='submit']").click()
            
            WebDriverWait(driver, 10).until(
                EC.url_contains("/dashboard")
            )
            assert "/dashboard" in driver.current_url
        finally:
            driver.quit()

Playwright's version is shorter, has no explicit waits (they're built in), and runs faster.

Cross-Browser Config in Playwright

Configure multiple browsers in playwright.config.ts:

import { defineConfig, devices } from '@playwright/test';

export default defineConfig({
  projects: [
    { name: 'chromium', use: { ...devices['Desktop Chrome'] } },
    { name: 'firefox', use: { ...devices['Desktop Firefox'] } },
    { name: 'webkit', use: { ...devices['Desktop Safari'] } },
    { name: 'edge', use: { ...devices['Desktop Edge'], channel: 'msedge' } },
    
    // Mobile browsers
    { name: 'mobile-chrome', use: { ...devices['Pixel 5'] } },
    { name: 'mobile-safari', use: { ...devices['iPhone 12'] } },
  ],
});

Run cross-browser tests:

npx playwright test --project=chromium --project=firefox --project=webkit

Cross-Browser Config in Selenium

Selenium's cross-browser setup requires more manual work:

# conftest.py
import pytest
from selenium import webdriver

@pytest.fixture(params=["chrome", "firefox"])
def driver(request):
    if request.param == "chrome":
        options = webdriver.ChromeOptions()
        driver = webdriver.Chrome(options=options)
    elif request.param == "firefox":
        options = webdriver.FirefoxOptions()
        driver = webdriver.Firefox(options=options)
    
    yield driver
    driver.quit()

Safari requires safaridriver to be enabled manually on macOS, and doesn't work in CI without additional setup. Playwright's WebKit runs anywhere without OS-level browser installation.

Where Selenium Wins

Legacy system compatibility: If you're testing a web app that supports IE 11 or very old browser versions, Selenium is your only option. Playwright doesn't support IE and only supports relatively recent browser versions.

WebDriver Standard: Selenium implements the W3C WebDriver spec. If you need portability across tools (Appium for mobile, cloud grids with standard WebDriver endpoints), Selenium's standardized protocol is an advantage.

Existing test suites: If you have 10,000 Selenium tests working reliably, the cost of migrating to Playwright may not justify the benefits. Playwright is the better choice for new projects; migrating established Selenium suites is expensive.

Language support: Selenium supports Java, Python, JavaScript, Ruby, C#, and Kotlin. Playwright supports JavaScript/TypeScript, Python, Java, and C#. If your team uses Ruby, Selenium is your only option.

Where Playwright Wins

Reliability: Playwright's built-in auto-waiting eliminates the most common source of flaky tests. Elements must be visible, enabled, and stable before Playwright acts on them.

Speed: For green-field projects, Playwright tests consistently run faster.

Browser management: playwright install handles everything. No ChromeDriver/GeckoDriver version management.

Modern features: Network interception, storage state management, browser context isolation, and tracing are first-class features in Playwright. Adding them to Selenium requires third-party libraries.

TypeScript first: Playwright's TypeScript API is polished. The JavaScript/TypeScript ecosystem tooling (VS Code extension, trace viewer) is excellent.

WebKit testing: Playwright's WebKit engine lets you test Safari behavior without macOS. This is a significant advantage for teams running CI on Linux.

The Migration Decision

If you have a Selenium test suite:

• Keep Selenium if: The suite is stable, you have IE requirements, or the migration cost exceeds the benefits of faster/more reliable tests.
• Migrate to Playwright if: You have significant flakiness problems, your CI run time is a bottleneck, or you're adding significant new test coverage.

If you're starting fresh in 2025: choose Playwright. The developer experience, reliability, and speed advantages are significant, and the Selenium ecosystem's main strength (maturity) is less relevant when you're not migrating an existing suite.

For cross-browser testing specifically, Playwright's bundled browser management and WebKit support make it the stronger choice for most web applications.