March 30, 2016 marked the launch of Safari Technology Preview, Apple's browser for testing new web technologies. Unlike the main Safari browser, it features a distinctive purple icon and is designed primarily for developers to experiment with upcoming features. Crucially, no developer account is required to download and use it, making cutting-edge web capabilities accessible to a broader audience.

Today, it supports macOS Sequoia and macOS Tahoe, with future compatibility expected for macOS 27. Over the past decade, Apple has released 240 versions, each accompanied by detailed release notes highlighting new additions and fixes that eventually make their way into the standard Safari browser. This ongoing process allows Apple to gather extensive real-world feedback on emerging web standards before their official rollout, shaping the future of browsing across Apple's ecosystem.