There are different ways to change what App is the Default for certain files and operations on the macOS. The Mac comes with Apple’s Safari App as the Default Web Browser. That is what I use most of the time. It is fast and interacts with the macOS and Apple Apps the best. I do have other web browsers on my Mac in case Safari has issues with a website. If you prefer to set another web browser like Firefox or Chrome as your Mac’s Default browser, then read this article which shows you how to do this, it is not difficult.