Why do we test website on different browsers?

We test websites on different browsers to check whether the website works as intended across all possible combinations of browsers, OS, devices, and resolutions. Cross-browser testing helps you ship user-friendly and browser-agnostic websites.

How do I run a test script in multiple browsers?

With TestMu AI you get access to 3000+ browser and OS combinations. Sign up, select your browsers, provide your URL, and start a live session or run automated scripts in parallel across Chrome, Firefox, Safari, and Edge.

How do I test a website in multiple browsers?

To test a website in multiple browsers using TestMu AI, sign up or log in, select browsers and platforms, upload your website or provide a URL, choose test configurations, run the tests, review results for screenshots and videos, debug any issues, and retest after fixes.

How to test websites on different browsers remotely?

To test websites on different browsers remotely, you can use online browser testing platforms. These platforms allow you to access various browsers and their different versions from your own computer. This method is convenient for testing compatibility across multiple browsers without needing to install them all on your own machine.

Is it necessary to test the website on several browsers?

Yes, it is necessary to test websites on several browsers because different browsers can interpret code differently. Testing helps ensure your website looks and works correctly for all users, regardless of the browser they use.

How to test a website in different browsers the easy way?

The easiest way is to use TestMu AI. Sign up, enter your URL, select any browser and OS combination, and you are inside a live session within seconds. No software to install, no VMs to maintain, no browser licenses to manage.

How do I view my website in another browser?

With TestMu AI, go to the cross-browser testing dashboard, pick any browser from 3000+ combinations, enter your URL, and start an interactive live session. You can use native DevTools, take screenshots, mark bugs, and share sessions with your team directly.

How to test multiple browsers in Selenium?

To test multiple browsers in Selenium, set up WebDriver for each browser you want to test, then write test scripts specifying the browser to use. Selenium will open the browser and run your tests, ensuring your web application works across different browsers.

Can you have 2 browsers at the same time?

Yes, it is possible to use multiple browsers simultaneously on one computer without affecting each other's settings, history, bookmarks, etc. This can be achieved by using separate user profiles for each browser or by using browser testing tools.

What is testing on different browsers called?

The process of testing websites or web applications across various web browsers to guarantee consistent functionality and appearance is known as cross-browser testing.

Why Is It Important to test your site in multiple browsers?

Cross-browser testing identifies browser-specific compatibility errors, allowing for quick debugging. It ensures your website works for all users, avoiding alienating a significant audience due to browser or OS issues.

How can I test on different browsers for free?

TestMu AI offers free live interactive browser testing sessions each month along with 100 minutes of free automation testing. Sign up for a free account to start testing across Chrome, Safari, Firefox, Edge, and more at no cost.

Test Website On Different Browsers

Test websites on different browsers and devices, including Chrome, Safari, Firefox, and Edge across Windows, macOS, Android, and iOS.

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Why Choose TestMu AI (Formerly LambdaTest) to
Test Websites on Different Browsers

REAL BROWSER COVERAGE

Test on Real Desktop and Mobile Browsers

Test your website on 3,000+ real browsers and OS combinations, without setting up VMs or managing browser installations locally.

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Access Chrome, Firefox, Safari, Edge, and Opera across all major versions in one place
Test on real Windows, macOS, Android, and iOS devices and OS builds without emulators
Test Safari on macOS and iOS without needing to own a Mac or any physical Apple device

DEVELOPER TOOLS

Debug Any Browser Issue With Built-In DevTools

Debug layout and JavaScript issues on any browser using native DevTools, without switching between your local setup and the cloud.

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Inspect and edit CSS live across Chrome, Firefox, Edge, and Safari during your session
Capture full network requests and response payloads in session to trace any API issue
Set breakpoints and debug JavaScript execution in any browser without a local install

CHROME EXTENSIONS

Test Your Site With Chrome Extensions Pre-Loaded

Test your website with Chrome extensions loaded, without re-authenticating or reinstalling them between sessions.

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Test how ad blockers and extensions affect your analytics, paywalls, and checkout flow
Verify login and checkout forms work correctly with password manager extensions loaded
Extensions stay active and authenticated for your full testing session without a reset

LOCAL TESTING

Test Localhost and Staging Before They Go Live

Test public & internal websites on development environments, without the hassle of exposing your network or configuring a public URL.

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Test localhost and staging URLs on real browsers through a secure and encrypted tunnel
No public URL, no port forwarding, and no firewall configuration changes are required
Share your tunnel session with teammates so they can debug the same environment live

More Reasons to Test Your Website with TestMu AI

Screen Resolution

Change screen resolution during testing to see how your layout responds across different sizes.

Upload Files

Upload files from Google Drive or local storage to test file interactions without leaving your session.

Mark as Bugs

Flag UI issues instantly and share them with your team without leaving the session.

Built-in Project Management

Switch between project versions and save progress directly inside the test environment.

120+ Integrations

Connect to your testing stack through 120+ integrations including Jira, Slack, and GitHub.

24/7 Support

Reach our support team anytime via in-app chat or email at [email protected].

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LambdaTest is now TestMu AI

On January 12, 2026, LambdaTest evolved into TestMu AI, the same trusted testing cloud, upgraded for the AI era.

Now a full-stack agentic AI quality engineering cloud, it automates end-to-end testing across web, mobile, and AI apps. The platform is AI-native, with autonomous agents that plan, author, execute, analyze, and optimize tests.

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The next era of the world's first fully Autonomous Agentic AI Quality Engineering Platform is here.

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