Cross Browser Compatibility Testing Checklist: The Do's and Dont's cover

Cross Browser Compatibility Testing Checklist: The Do’s and Dont’s

Browser compatibility testing checklist? Website testing checklist? Or website QA testing checklist? Although the names vary, what stays common is that the need and importance of this checklist will define your site’s veritable success.

Every year, more and more digital devices are launched, each with its specific combination of browsers, operating systems, and screen resolution. This makes the job of a tester infinitely more complex. However, thanks to cross-browser testing tools like Testsigma, testing across different browsers, devices, and resolutions are simple. It takes only a few seconds to get a detailed analysis of other formats, letting you tailor your pages accordingly.

Testsigma- Cross Browser Testing-1

As a web developer or product manager, you must use browser compatibility testing to guarantee that your website is compatible with all technologies. As a result, organizations must perform cross-browser compatibility testing before any product launch.

Why do you need Cross-browser Testing?

Each mobile phone has a unique operating system, default browser, and screen resolution.

To begin with, you should use it to provide your clients, customers, and visitors with the most satisfactory possible experience. With that much versatility, how can you ensure that your website or application looks and performs correctly across a wide range of browsers, devices, and operating systems?

Cross Browser Compatibility Testing assures that everything functions flawlessly regardless of the operating systems, devices, or browsers used to access it.

A list of tools is available to help Developers determine whether a specific technology on a website is compatible with a particular browser.

HTML5 Please

For example, HTML5 Please checks if HTML5, CSS3, and a simple search of a property, parameter, or feature will reveal which browsers and versions support that technology. Also, check if other features are ready for usage and, if so, how you should use them. These tools can assist you in making better judgments about website and application development.

The importance of browser compatibility testing

When developing a new website, cross-browser compatibility is a frequently forgotten stage. Designers and developers will often use a single browser to create it — and they may rapidly test it on a few more browsers before declaring the project complete. This is sufficient for simple non-mission-critical sites, but if you’re constructing more complicated ones, your site may look drastically different in other browsers.

Potential Device-Cross browser testing

Of course, testing every page on every potential device, platform, and browser combination is practically impossible and prohibitively expensive. So, how can we ensure that our site looks and behaves exactly as we intended on as many browsers as possible?

That’s where Cross Browser Compatibility Checklist comes to play, explaining The Do’s and Don’ts.

A strategy, A tool, and a noteworthy website:

The website QA testing checklist is an integral part of site testing, but it can be challenging to achieve due to the enormous number of browsers available in the market today and in the future. It becomes even more complicated when multiple devices and browsers run on them. However, a proper cross-browser strategy will help you with your daily job.

If you’re going to perform cross-browser tests, create an effective cross-browser testing strategy. Here are some top tips that would lead you to the top:

  • Choose a suitable range of devices and browsers.
  • Use automation and parallel testing.
  • Move to test on the Cloud over on-premise testing.
  • Select a highly scalable testing platform.
  • Select the finest UI Testing Frameworks
  • Web Application UI Testing Framework
  • Mobile Application UI Testing Frameworks

When you’ve decided on a cross-browser testing strategy, test your locally hosted website or development site with cross-browser testing tools like Testsigma before going live. The platform runs your automated tests on the cloud—2000+ genuine desktop and mobile devices and versions, including the most recent. Cross-browser compatibility and accessibility impact your website’s SEO; thus, it’s always necessary to have it tested and perfectly compatible for site crawling on search engines.

Keep mobile devices nearby, or install emulators or simulators. Put another way, you can choose a platform that provides all the devices you require, such as Testsigma, which supports continuous integration and third-party connections with JIRA, GitHub, Slack, and others for more effective execution.

All about Cross Browser Testing Checklist You need to know:

There are some prerequisites for Cross Browser testing that you should review before beginning cross-browser testing.

  • Define the scope of testing—how much testing will be done, when it will be done, and how much functionality will be covered?
  • Create a plan for cross-browser testing- Which browsers (and versions thereof) will be used, as well as which operating systems and devices? What combinations will be tested?
  • Select the appropriate tool- Choose the best automation cross-browser testing tool from the options offered. During the selection process, we may ask questions such as.

Consider the cross-browser compatibility testing checklist into parts, which will help you execute testing in the best way forward:

  • By Testing General Browser Compatibility
  • Validating Layout and Design
  • Ensuring the Functional Compatibility

Checklist for General Browser Compatibility Testing:

This website Testing checklist tests the critical features for the website to work correctly. Some of the most important ones are listed below:

  • Validate the CSS, HTML and XHTML. This will ensure that all code meets relevant standards and that there are no open tags.
  • Validate the SSL certificate. Some SSL certificates are not compatible with all browser versions, so checking this before proceeding is essential. You also need to know who owns the website domain you’re using.
  • Take care of visual elements; validate the fonts, fields, and design.
  • To ensure that web pages are displayed correctly on various screens with different size ratios and resolutions, it is crucial to verify that they work effectively on multiple screens. Browsers may apply their default styles to your website by default. Chrome, for example, will add a default margin to your website – a minor but perceptible difference if you pick a darker background color.

To resolve this, you can use some code to reset the defaults, removing the mystery of why some styles differ in different browsers.

  • It is also essential to verify the DOCTYPE instructions on every webpage. Define the language in which the code is written at the start of your HTML file(s) so that browsers can appropriately read it. This ensures that all browsers will parse the web pages similarly.
  • Since API calls can differ between browsers, you must be cautious if your application uses APIs. It would be best to ensure that the APIs used are compatible across various browsers to avoid compatibility issues.
  • Another essential thing to do is verify the HTML’s X-UA-Compatibility meta tag. This helps to overturn a user’s compatibility view setting in Internet Explorer for your website.
  • Both points are crucial for ensuring that your website is accessible and secure for all users.

Checklist for Layout and Design:

The Layout and Design checklist is essential for ensuring that your webpage is visually pleasing and consistent across all browsers.

  • Check that the layout, style, and design are consistent in all browsers used for Cross Browser Compatibility Testing.
  • All images present should be in standard resolution.
  • Check the correctness of Basic alignment settings on all browsers and operating systems used for Cross Browser Compatibility Testing.
  • Make sure all fonts and designs are incorporated correctly and consistent in size, colors, etc., on all browsers used.
  • Ensure that everything looks and functions correctly across all different browsers. This includes ensuring that all boxes and forms are aligned perfectly, that colors are uniform, and that headers and footers are consistent.
  • Check the site’s responsiveness on different browsers and ensure that data is aligned correctly.
  • Check browser compatibility for any audio or video formats you’re using.
  • Ensure the source code doesn’t contain typos or other errors.
  • Check that the zoom-in and zoom-out functions work correctly.
  • Hover over elements with the mouse to ensure they can be selected correctly.
  • Check that all drop-down menus show all the available options.
  • Test the navigation between web pages to ensure it’s fast and accurate.
  • Check that pop-up appear correctly and consistently on all browsers.
  • Make sure that any tables or grids on the website are aligned correctly.

Taking these steps can help ensure that your website looks great and works well no matter what browser someone uses.

Checklist of Functional Compatibility:

Use the functional checklist below to ensure that all website functions work as expected in all browsers used for Cross Browser Compatibility Testing:

  • Verify that all plugins integrated into the website are compatible with all browsers.
  • When downloading and uploading, verify that the formats of files (text, images, videos, etc.) are compatible.
  • Verify jQuery and AJAX functionalities.
  • Ensure that search results are accurate, navigation links work correctly, and an error page appears when the website does not respond.
  • Ensure all functions (e.g., saving data, importing and exporting, submission) are working correctly.
  • Check that flash is working properly and that any animations function correctly across browsers.
  • Ensure device interaction (keyboard, mouse) is uniform across different browsers.
  • Ensure script validation across different browsers.
  • Test the ability to handle different loads on different browsers.


Browser compatibility testing is essential to ensure your website functions correctly across different browsers, operating systems, and devices. The browser compatibility testing checklist can be used to ensure you don’t miss any critical details that could cause problems later on. By following this checklist, you can be sure that your website will work correctly for everyone.

Testsigma Cross Browser Compatibility -2

With the above Cross-browser compatibility testing checklist, you can ensure that your website is at its best in the 2022 market and beyond. Testsigma is your go-to tool for performing cross-browser testing. Testsigma provides a platform to run manual and automated tests using different frameworks and languages. It is designed to be user-friendly so that everyone, including SMEs & QAs, can write automated tests using simple English. The platform provides access to 2000+ real desktops, and iOS & Android browsers for cross-browser tests online. In addition, it is highly scalable, so tests can be run in parallel on the cloud-based test lab.

Moreover, it can generate screen types for a wide range of devices, creating multiple possibilities to try different combinations to ensure the highest quality of your page. With the help of this platform, a tester can find bugs quickly and communicate with the team to address them. It also has a dashboard that displays the test status and progress. Hence, it is a good option for organizations looking for a simplified testing platform that supports cross-browser testing.

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