Applications and sites can behave differently. It is regarding the fact that each browser has its own extensions, plug-ins and also differences in the desktop and mobile versions. Cross browser testing is performed in order to decrease these differences, making the development more or less universal.
Why do cross browser errors appear:
- Sometimes a browser itself has a bug or the functions are implemented differently. Often such a thing takes place through attempts to gain a competitive advantage.
- Some devices may contain restrictions that may cause the website to run slower or display incorrectly. For example, if the site was designed for the desktop, it is likely that its content will be difficult to read on a mobile device.
- Testing in popular browsers must be performed after testing the site for defects by other types of testing. Only in this case, we can say that the detected incorrect scripts are related to the features of the browser and were not omitted at other stages. It is clear that the error should not be detected in all browsers. You should also pay attention to the combination of operating system and browser, choosing the most common of them.