Cross-browser compatibility is the ability of your website or a web application to work in different browsers and work in full compatibility with browser features.
While most people continue to use a single browser, you have dozens of options for both desktop and mobile devices. Ideally, websites are displayed perfectly no matter which browser you use. However, this is not always the case as cross-browser testing comes into play.

With thorough cross-browser testing, you can ensure that your website looks perfectly across all the popular browsers. That way, your visitors will have an equally great experience, whether they’re using Firefox, Chrome, Opera, or less-known options such as SeaMonkey.