Cross-browser testing is not just about testing different browsers, but also involves considering various other metrics such as operating system versions, mobile device compatibility, geolocation, and automation frameworks. A good cross-browser testing strategy should prioritize metrics that are most relevant to the business and website requirements. This includes creating a matrix of browser versions and operating systems, validating responsive web design, performing geolocation testing, using automation frameworks like Selenium, and planning for regression testing. It is also essential to select the right test automation framework and cloud service provider that meets specific needs and budget constraints. By focusing on these key metrics, businesses can ensure comprehensive cross-browser testing and avoid potential issues with user experience and compatibility.