Yesterday afternoon, Apple launched version 160 of its browser under test for all users who want to try it. Safari Technology Preview. A Safari with new features that you can try before they are finally implemented in the official version of Safari.
And you don't need to have a developer account for it. You simply install it on your Mac as a standalone app from the native Safari of macOS so you can try it whenever you feel like it.
In 2016 Apple decided to release a new app called Safari Technology Preview. It is independent of the traditional Safari, and brings certain new features that are still in the testing phase. The "grace" of said Safari in tests is that it is not necessary to have a developer account to install it on your Mac. Anyone can do it and try it without problem.
Yesterday Wednesday he was released Safari Technology Preview version 160, which includes bug fixes and performance improvements for Web Inspector, CSS, Rendering, Web Animations, SVG, Media, JavaScript, WebAssembly, Service Workers, Accessibility, Editing, and Web API.
This new version can only be installed on Macs with the operating system macOS Monterey or the current macOS is coming.
What Apple wants to do with Safari Technology Preview is to collect data and feedback from developers and users about how it works in general for the browser development process. Safari Technology Preview can run independently of the existing macOS native Safari browser, and while it's designed primarily for developers, does not require a developer account to download and try it on your Mac.
So if your curiosity is piqued and you want to try it, you just have to download it from the official website of Safari Technology Preview and thus you will help the company in the development of new features of Safari, which once tested in the Preview, will go to the Safari that we all know in future updates.