Safari technology preview is a Safari browser designed for browser . Safari technology preview allows developers to view new Web technologies for OS X and iOS platforms in advance, including the latest layout technology, visual effects and other development tools.
Safari tech preview is perfectly compatible with iCloud, as opposed to WebKit Nightly previews, which allows users to access iCloud Tabs, Reading List, Bookmarks, and other iCloud features.
other new features, the browser version is provided through the ripped signature and verification, and other functions. While the lack of support for iCloud has long been a major headache for Web developers using Safari as their primary browser, developers now have different options and can still use their bookmarks and favorites and access their reading lists when visiting other devices.
Safari tech preview is a standalone application, so it runs concurrently with the normal Safari browser, and can easily switch between the two versions