Compatability Testing Across OS and Browsers : A big Need of the hour

Posted By :Nuzhat Siddique |30th September 2021


Cross-browser testing is the leading challenge for software testers. There’s an endless combination of varied legacy and modern browsers for software testers to check applications and websites to iron out compatibility issues.


The broad diversity in browsers and browser-specific functional parameters influence the performance of an application and its behavior across different browsers. Since it is difficult to identify each visitor’s personal choice of a browser, it becomes the most important requirement to develop software that is fully compatible across multiple browsers and operating systems. This situation makes it urgent to perform aggregate Cross Browser Testing before deploying any application. Cross-browser testing is a way of analyzing and comparing application functionality and styles across several browser platforms, mobile devices, and OS’s, to identify any potential inconsistency.


How important is Cross-Browser Testing?


As we see that users around the world have their own choice of browsers used, it is important that an application opens and functions smoothly regardless of the browsers chosen. Firstly, an application tested for multi-browser compatibility is monitored for CSS style rendering across multiple browsers. As the newer CSS elements and HTML tags are not supported by the older versions of some browsers. Secondly, the interpretation of the Javascript/Jquery codes is not the same way for all different browsers. It helps in finding and fixing scripts that are absolutely fine in one browser and getting rendered as non-responsive on others. Thirdly, in today’s technical world, browsers are not limited to personal computers, but their usage is extensive in mobiles as well. This makes cross browser testing for mobile browsers essential.


Adaptability and User experience


Functionality is the backbone for any application, but an appealing user experience will drive higher adoption of the application and automatically improves adaptability among the users. During a competing market, the window of opportunity is to drive the adoption of applications regardless of browsers, devices, and platforms. Cross-browser testing makes sure an application has smooth functionality in a wide selection of browsers and Operating systems creating a pleasing user experience and increasing usability among the users.


How is Cross-Browser Testing performed?


After selecting the most important and the most generally used browsers from plenty of available browsers, to get started with this testing procedure is to open the application on multiple browsers and cross-check against a set of desired expectations. The most common browsers considered for testing are the latest versions of Mozilla Firefox, Google Chrome, and Safari. However, due to ample usage, the following browsers need to be tested:


- Google Chrome (Windows and Mac)

- Mozilla Firefox(Windows and Mac)

- Safari (Windows and Mac)

- Internet Explorer and Microsoft Edge (Windows, Version 7 – 11)

- Android

- iPhone

- iPad

- Windows Phone


The application is tested in a selected browser with an idea of the application's display and functionality. When testing with desktop browsers is completed, the focus is shifted to the mobile browsers. Testing with all the desktop and mobile browsers can be a long and tedious process, so the main checks performed include a display, animations, and the functionality that uses background processes. Fixing application issues might not be possible in certain browsers that are rarely used. In such cases, the main focus will be on the functionality and usability of the application.


There are various tools online that can be licensed or freely downloaded for carrying out compatibility and usability tests. And can make your cross-browser testing less painful, as these tools are having a set of OS and browser requirements configured. Users can make setup the environment they need and they are good to go. Some of the available tools are:


- Lambdatest

- BrowserStack


- Sauce Labs


The objective of using the tool is to make the testing activity more repetitive, faster, and easier. It is recommended to freeze the testing objectives before selecting the CBT tool.


It will be very useful to have the following tasks performed before the activity begins:


- Select the key URLs /pages of the application

- Select the pages based on the company emphasis.

- Select the modules that are highly used or accessed

- Go by the template format of your application and plan the tests accordingly.




Software Compatibility Testing helps development teams to make sure that testing is an ongoing activity and the results are much more valid. Businesses are getting more considerate about the importance of Compatibility Testing, as it goes a long way in safeguarding customer experience. Undoubtedly, it is important for application makers to adjust themselves to it and offer a smooth and seamless experience as well.

About Author

Nuzhat Siddique

Nuzhat is a highly skilled Quality Analyst with a strong background in both manual and automated testing. She possesses extensive knowledge in manual testing methodologies and excels in all aspects of Test Documentation processes. Her proficiency in using tools such as MySQL, Postman, MongoDB, LambdaTest, and Selenium has enabled her to perform effective application testing. She has successfully completed and delivered software testing projects for various domains, including E-Learning, Healthcare, ETL, and IoT. Her notable contributions include projects such as Konfer and HP1T. Additionally, she have experience in test management and defect tracking systems such as Trello and Jira. Nuzhat also has hands-on experience with test automation tools such as Selenium and Protractor. She is a self-driven and self-motivated person with excellent communication and presentation skills.

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