One thing that is evident with developers is their preferences for IDEs, operating systems, browsers, etc. If you take the case of web developers, a majority of them have an affinity towards certain types of browsers, due to that preference they prefer cross-browser testing their source code only on ‘browsers of their choice.' After testing, the functionalities programmed by the web developer may work fine on specific browsers, but the situation, in the real world, is completely different. The users of your web app or website might come from different parts of the world and may have a different preference towards browsers (or browser versions); some customer may even prefer to use completely outdated browsers, which are having a minuscule market share in the browser market.
Read More: https://dzone.com/articles/skyrocket-your-cross-browser-testing-with-minimal