Get Ahead With Cross-Browser Testing for Front-End Dev
Published at March 23, 2023

In today's digital age, the internet has become an essential aspect of our daily lives, with millions of people accessing websites every day. According to Statista, there are 5.16 billion people who use the internet. While there are 4.76 billion social media users.

With this increasing demand for online content, businesses must create websites that not only look great but also function properly on all devices and browsers. Unfortunately, browser compatibility issues are one of the most significant challenges in front-end development.

Browser compatibility problems can occur when a website is designed to work on one specific browser but fails to function properly on other browsers. This can lead to a poor user experience, slow loading times, broken links, and other issues that can impact website performance. In addition, browser compatibility issues can cause a loss of traffic and damage the reputation of a website. As a result, front-end developers need to ensure that their websites are compatible with all popular browsers and devices.

To solve this issue, front-end developers rely on a technique known as cross-browser testing. This is a process that involves testing a website on different browsers and devices to ensure it works as intended. In this blog post, we’ll take a deep dive into the importance of browser compatibility and cross-browser testing in front-end development, as well as the best practices and tools for ensuring compatibility across all browsers.

What is Browser Compatibility?

According to Omniconvert, browser compatibility refers to the ability of a website to work correctly across different browsers, such as Google Chrome, Firefox, Safari, and Internet Explorer. These browsers use different rendering engines that interpret website code in various ways. As a result, a website may appear and function differently on different browsers.

According to Statcounter as of February 2023, Google Chrome is the most popular web browser with a share of over 65.76% of the market. The next most popular browser is Safari, with a market share of more than 18.84%. Edge and Firefox follow behind with market shares of 4.28% and 2.93%, respectively. Although other browsers such as Samsung Internet and Opera have a market share of around 2-3% each, Internet Explorer has less than 1% of the global market share.

Websites need to be compatible with all popular browsers to reach a wide range of users. A website that functions well on one browser but not on others can result in loss of traffic, lower search engine rankings, and damage to the reputation of the website.

What is Cross-browser Testing?

Cross-browser testing is a type of testing that is focused on making sure that a website's essential features and functions can be accessed and used by users across a range of different browsers, operating systems, devices, and assistive tools. This testing is essential because each browser and operating system combination may display a website differently or have specific requirements that need to be met for the website to work correctly.

For instance, a website that looks perfect on Google Chrome may appear broken or unresponsive on Safari or Firefox. Cross-browser compatibility testing helps developers identify these issues and address them before users encounter them. This type of testing is non-functional, which means it's not focused on testing a particular function but instead checks that the website can function effectively across different browsers and platforms.

The Importance of Cross-Browser Testing in Front-End Development

Cross-browser testing is an essential step in front-end development according to BrowserStack. It ensures a website works correctly on all browsers and devices.

This allows developers to quickly identify and resolve issues that could impact user experience, website functionality, and website performance. By identifying browser-specific compatibility errors, developers can enhance website design to function properly and provide optimal user experience across various devices and operating systems.

Moreover, cross-browser testing also plays an essential role in preventing the loss of traffic to a website. When a website does not work correctly on specific browsers or operating systems, it may frustrate users, leading them to abandon the site and seek alternative options.

Cross-browser testing helps ensure that websites are accessible to a larger audience, regardless of their preferred browser, operating system, or device. Therefore, it can maximise traffic and enhance brand reputation.

Tools for Cross-Browser Testing

There are several tools available to help with cross-browser testing, including:

1. BrowserStack

It is a cloud-based platform that allows developers to test their websites on over 2,000 real devices and browsers. The platform functions as a browser emulator and enables developers to perform compatibility tests on their web applications in real-time, ensuring that they perform optimally across various devices and web browsers.

BrowserStack allows developers to detect bugs and other issues that can occur when users try to access their websites through different browsers and devices. This platform helps web developers to identify and rectify compatibility issues, ensuring that their websites perform consistently and deliver a seamless user experience.

2. Sauce Labs

A cloud-based testing platform that offers automated testing across different browsers and devices. One of the main benefits of using Sauce Labs is that it allows developers to test their projects across different browsers and devices, ensuring that they function properly on a wide range of platforms.

Using Sauce Labs, developers can run automated tests that check the functionality, performance, and compatibility of their projects across a variety of devices and browsers. This can help save time and resources that would otherwise be spent manually testing each device and browser combination.

It also can ensure that any issues or bugs are identified and resolved before the project is launched. In addition, Sauce Labs provides detailed reports and analytics that allow developers to track the results of their tests and identify areas for improvement.

3. CanIUse

It is a website that provides information on the browser compatibility of various CSS properties and HTML features. It is a useful tool for developers who want to ensure that their website looks and functions correctly across different browsers.

CanIUse provides a database of web technologies, which developers can search to see whether they are supported by different browsers and versions. With CanIUse, developers can see which browsers support specific features, as well as any known issues with those features. This allows developers to make informed decisions about which features to use in their website design and to plan for fallbacks for browsers that do not support certain features.

The website is regularly updated with new information, ensuring that developers have access to the latest data on browser compatibility. CanIUse is a valuable tool for developers who want to create a seamless user experience for all visitors to their websites, regardless of the browser they are using.

Best Practices for Cross-Browser Testing

To ensure the best results, developers should follow these best practices for cross-browser testing:

  • Test on multiple browsers and devices – it’s important to test a website on various browsers and devices to ensure it works correctly for all users.
  • Test on different versions of browsers – different versions of browsers can have varying levels of support for HTML, CSS, and JavaScript features.
  • Use web standards – adhering to web standards and avoiding browser-specific code can help ensure compatibility across all browsers.
  • Optimise website performance – testing for performance across different browsers and devices can help ensure a consistent user experience.


Browser compatibility and cross-browser testing are essential components of front-end development. Ensuring a website works correctly across all browsers and devices is critical for providing a positive user experience, building trust with users, and maintaining the reputation of a website. By following the best practices and utilising the tools available for cross-browser testing, developers can create websites that work seamlessly across all browsers and devices.

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