<ul data-eligibleForWebStory="true">Apple released Safari Technology Preview 221, an experimental browser introduced in March 2016.It allows users to test features planned for future Safari versions.Safari Technology Preview 221 includes fixes and updates for various areas like Accessibility, JavaScript, and Web API.Compatible with macOS Sequoia and macOS Tahoe.Available through the Software Update mechanism for download.Aim is to gather feedback from developers and users.Designed for developers but does not require a developer account.Update can run alongside the existing Safari browser.Complete release notes are available on the Safari Technology Preview website.Apple wants feedback on the browser development process.Users can discuss the article on MacRumors.com forums.