Introduction
Learning how to run Playwright tests on multiple browsers is an essential skill for QA Automation Engineers, SDETs, Selenium engineers transitioning to Playwright, software testing students, QA engineers, and developers. Users access web applications through different browsers, operating systems, and devices. A feature that works perfectly in Chromium may behave differently in Firefox or Safari.
Cross-browser testing ensures your application provides a consistent user experience regardless of the browser being used. Unlike Selenium, which often requires Selenium Grid or third-party services for browser management, Playwright includes built-in support for Chromium, Firefox, and WebKit, making multi-browser automation simple and efficient.
In this how to run Playwright tests on multiple browsers tutorial, you’ll learn:
- What cross-browser testing is
- Why multi-browser testing is important
- How to configure browser projects
- How to execute browser-specific tests
- Real-world testing scenarios
- Best practices
- CI/CD integration
- Interview questions
What Is Cross-Browser Testing in Playwright?
Cross-browser testing verifies that a web application behaves consistently across different browsers.
Playwright supports three browser engines:
| Browser Engine | Supported Browsers |
| Chromium | Google Chrome, Microsoft Edge, Chromium |
| Firefox | Mozilla Firefox |
| WebKit | Safari engine |
Playwright executes the same test suite against multiple browsers without requiring separate test scripts.
Benefits of Running Playwright Tests on Multiple Browsers
Understanding how to run Playwright tests on multiple browsers provides several advantages:
- Detect browser-specific UI issues
- Improve application compatibility
- Increase customer confidence
- Reduce production defects
- Simplify regression testing
- Built-in browser management
- Faster execution with parallel projects
- Excellent CI/CD integration
Step-by-Step Tutorial: How to Run Playwright Tests on Multiple Browsers
Step 1: Install Playwright
Create a new Playwright project.
npm init playwright@latest
Install browser binaries.
npx playwright install
Verify the installation.
npx playwright –version
Step 2: Configure Multiple Browsers in playwright.config.ts
Update your Playwright configuration.
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’]
}
}
]
});
Explanation
This configuration creates three browser projects:
- Chromium
- Firefox
- WebKit
Each Playwright test automatically runs on all configured browsers.
Step 3: Create a Sample Playwright Test
Create tests/home.spec.ts.
import { test, expect } from ‘@playwright/test’;
test(‘Verify homepage title’, async ({ page }) => {
await page.goto(‘https://playwright.dev’);
await expect(page).toHaveTitle(/Playwright/);
});
Expected Behavior
The same test executes on:
- Chromium
- Firefox
- WebKit
without modifying the test code.
Step 4: Run Tests on All Browsers
Execute:
npx playwright test
Expected output:
Chromium
✓ Homepage title
Firefox
✓ Homepage title
WebKit
✓ Homepage title
Step 5: Run Tests on a Specific Browser
Execute only Chromium.
npx playwright test –project=Chromium
Run Firefox.
npx playwright test –project=Firefox
Run WebKit.
npx playwright test –project=WebKit
Practical Use Case
Developers often execute only one browser locally while validating all browsers in CI/CD pipelines.
Step 6: Customize Browser Projects
Each browser project can have unique settings.
Example:
projects: [
{
name: ‘Chromium’,
use: {
headless: false,
viewport: {
width: 1600,
height: 900
}
}
}
]
You can customize:
- Viewport size
- Headless mode
- Locale
- Timezone
- Permissions
- Geolocation
Real-World Cross-Browser Testing Examples
1. Cross-Browser UI Validation
Verify that navigation menus, forms, buttons, and layouts appear correctly across all supported browsers.
Scenario: Responsive company website.
2. Regression Testing
Run the complete regression suite before every release.
Example:
npx playwright test
Scenario: Release validation.
3. Responsive Testing
Combine browser projects with device emulation.
Example:
{
name: ‘Mobile Chrome’,
use: {
…devices[‘Pixel 7’]
}
}
Scenario: Mobile e-commerce application.
4. CI/CD Pipeline Execution
Execute tests automatically on every code commit.
Typical workflow:
Developer Commit
│
▼
CI/CD Pipeline
│
▼
Chromium
Firefox
WebKit
│
▼
Scenario: Continuous regression testing.
5. Enterprise Automation
Large organizations typically:
- Execute smoke tests on every commit
- Execute regression tests nightly
- Run all supported browsers in parallel
- Publish Playwright reports automatically
Playwright Multi-Browser Testing vs Selenium Grid
| Feature | Playwright | Selenium Grid |
| Built-in browser support | ✅ Yes | ❌ Requires Grid |
| Browser installation | Automatic | Manual |
| Configuration | Simple | More complex |
| Parallel execution | Native | Requires Grid setup |
| Cross-browser execution | Built-in | Infrastructure dependent |
| Setup time | Short | Longer |
Why Playwright Is Easier
Playwright includes browser management and project configuration out of the box, eliminating the need for Selenium Grid in many common testing scenarios.
CI/CD Integration
Multi-browser testing fits naturally into modern CI/CD pipelines.
Example GitHub Actions workflow:
name: Playwright Tests
on:
push:
jobs:
test:
runs-on: ubuntu-latest
steps:
– uses: actions/checkout@v4
– uses: actions/setup-node@v4
– run: npm install
– run: npx playwright install
– run: npx playwright test
Benefits
- Automatic regression testing
- Cross-browser validation
- Fast feedback after commits
- Easy report publishing
Best Practices for Multi-Browser Testing in Playwright
Follow these recommendations:
- Keep browser projects in playwright.config.ts.
- Execute smoke tests on every commit.
- Run full regression suites nightly.
- Use Playwright’s built-in device descriptors.
- Capture screenshots and traces on failures.
- Use parallel execution to reduce execution time.
- Keep browser versions updated.
- Prioritize stable, accessibility-based locators.
Common Issues & Troubleshooting Tips
| Problem | Solution |
| Browser not installed | Run npx playwright install. |
| Test passes in Chromium but fails in Firefox | Review browser-specific CSS, JavaScript, or timing differences. |
| WebKit rendering differences | Validate Safari-compatible styling and layouts. |
| Slow execution | Enable parallel execution and distribute tests across workers. |
| Browser crashes | Update Playwright and browser binaries to the latest compatible versions. |
Playwright Multi-Browser Testing Interview Questions with Answers
1. Which browsers does Playwright support?
Playwright supports Chromium, Firefox, and WebKit.
2. How do you execute tests on a specific browser?
npx playwright test –project=Chromium
3. Where do you configure browser projects?
In playwright.config.ts using the projects configuration.
4. Why is cross-browser testing important?
It ensures consistent functionality and user experience across supported browsers and platforms.
5. Why is Playwright simpler than Selenium Grid?
Playwright includes built-in browser management, parallel execution, and project configuration, whereas Selenium Grid requires additional infrastructure and configuration.
FAQs
What is how to run Playwright tests on multiple browsers?
It is the process of configuring Playwright to execute the same automated tests across Chromium, Firefox, and WebKit using browser projects.
How do I get started with how to run Playwright tests on multiple browsers?
Install Playwright, configure browser projects in playwright.config.ts, create a test, and execute it with npx playwright test.
Is how to run Playwright tests on multiple browsers suitable for beginners?
Yes. Playwright’s built-in browser support, simple configuration, and automatic browser management make cross-browser testing approachable for beginners while remaining powerful enough for enterprise automation.