Safari Extensions - Safari - Apple Developer
developer.apple.com › safari › extensionsSafari extensions. Enhance and customize the web browsing experience on iPhone, iPad, and Mac with Safari extensions. Using powerful native APIs and frameworks, as well as familiar web technologies such as HTML, CSS, and JavaScript, you can easily create Safari extensions in Xcode and distribute them on the App Store in the Extensions category. Xcode 12 and later supports the popular WebExtension API and includes a porting tool to make it easy to bring your extensions to Safari.