A Comprehensive Guide To Cross-Browser Testing: 4 Things You Should Know

Cross-browser testing is a critical part of the mobile app testing pipeline. It helps in eliminating various browser compatibility issues which an app may encounter when accessed through different browsers. How web browsers compile and present apps to the end-users tends to differ significantly. Each browser has its rendering engines, enabling it to interpret version, font, and size, plugin differently. Hence, the app tends to deliver anomalous performance if it is not validated through cross-browser tests. Cross-browser testing is essential for the software system to provide pixel-perfect UI on target browsers, devices, OS, and its combination, nullifying every cross-browser compatibility issue.


Cross-browser testing is a type of front-end testing that will deliver a quality and seamless user experience. It thus enables the app’s capability to improve customer retention and conversion rates. The test engineers verify the app page’s rendition or appearance in different browsers. Manually running the cross-browser tests is not feasible. Leveraging automation is crucial for test engineers to run parallel tests for the application under test across different browser-OS combinations. It helps in increasing testing speed, accuracy, and efficiency. Cross-browser automation testing is a valuable solution to keep up with Agile and continuous testing methodology and deliver the quality app to the market faster.

Creating a cross-browser test automation strategy is of paramount importance. The test engineers must prioritize the suitable test cases and choose the right tool and framework to improve test automation frequency and efficiency. It will enable the QA to validate the app’s compatibility with target browsers’ HTML and CSS rules and frameworks faster. The reporting feature of the test automation tool highlights if the test was successful or has failed. It will help identify any broken functionality, bottlenecks, or bugs in your app to improve its rendering on target browser-OS combinations.

Common Cross-Browser Compatibility Issues

Some of the most commonly encountered cross-browser compatibility issues include:

  • Some browsers may not support complex CSS, AJAX, JS, Flex features or behave differently.
  • Browsers maybe not be designed to support all image formats (PNG issues on older IE versions are popular).
  • All browsers or some versions fail to support certain HTML5 tags.
  • Browsers may not support all media formats.
  • Device constraints also necessitate the need for cross-browser testing.

Checklist For Cross-Browser Testing

  • Validation of HTML, xHTML, jQUERY, CSS, JS, AJAX 
  • Validation of SSL certificate 
  • Encoding HTML Character and validating Date Formats
  • Responsive Application, to check how the app renders on various screen resolutions
  • Verification of app’s layout consistency across browsers. Features like font styles and sizes, color rendering, navigation, client-side rendering, zooming should be assessed. 
  • Checking functional aspects such as animations and effects, plugins, links, and scripts.

Challenges In Cross-Browser Testing

The test engineers may encounter various challenges associated with cross-browser testing. These are:

  • Infrastructure And Scalability Challenges: Applications tend to have a varied and diverse user base that spans various devices, platforms, and browsers. Hence, the permutations and combinations of these elements can significantly increase test coverage. It can shoot up the cost of testing. Implementation of cloud-based testing helps to cut down costs and leverage optimal resource usage.
  • Strategy Challenges: Without proper planning, one may fail to get the desired results. Developing a test plan for cross-browser testing is crucial to overcome testing challenges and yield better outcomes. Between the test engineers, there should be constant communication and collaboration to get through testing faster. They must adopt a proactive approach to avoid errors through test planning.
  • Browser Version And Device Update Challenges: The browser market evolves continuously to keep up with the demands of the present times. The new versions of browsers, with advanced security patches and enhanced features, are released on the market from time to time. The major browsers have different rendering engines. It increases the complexity of cross-browser tests.

How To Automate Cross-Browser Testing?

  • Know What To Automate: Automating the entire test suite is neither feasible nor recommended. To achieve the desired results, prioritize the tests for cross-browser test automation. Typically repetitive tests, parallel tests, regression tests, or those highly prone to errors are suitable for test automation. Prioritizing tests will help to yield better outcomes and higher ROI on automation. 
  • Choose The Right Tool And Framework: Test automation is tool-dependent. Hence, choose the tool which suits your project needs. You should be able to quickly onboard it into your testing platform. Select a suitable framework that supports the right tools and techniques for test execution and reporting. The framework includes appropriate equipment, tools, scripts, procedures, engineers for successful automation. To demonstrate its feasibility, run a Proof of Concept to identify which one fits perfectly. 
  • Run Your Automated Tests In Parallel: Parallel testing on various browser-OS and device combinations help get better test coverage in a shorter span. 
  • Reporting And Analytics: Implement analytics to analyze the user base to identify target browsers and devices. The test automation tool must support report logs to analyze test failures, and highlight cross-browser compatibility issues, to fix them faster. 

To Conclude: 

These are a few things you need to know about cross-browser testing. It helps optimize your app’s front-end rendering on target browsers to ensure that it will deliver a seamless user experience.

You may also like...

Leave a Reply

Your email address will not be published. Required fields are marked *