Install and manage Safari exensions on the iPhone
Extensions are a type of add-on for web browsers that add extra features and functions. Safari for macOS has always had extensions and you may have them installed on your MacBook, iMac or mini. They can be very useful as they can boost productivity, make browsing the web less irritating, and so on.Extensions have been slow to come to mobile web browsers and iOS 15 is the first time true extensions have been available for Safari.