Since March 2016, Apple has had a kind of Safari ?beta channel? called Technology Preview. It is updated fortnightly, always anticipating news that may arrive in the stable / public version of the browser.
Today Apple released Safari Technology Preview 58, and this special because it already brings the news that I will see in the Safari 12 of macOS Mojave including, of course, support for favicons (cones) of sites in your tab bar. There is also an important new feature regarding the automatic generation of strong passwords.
And you know what the coolest? This Technology Preview is available for download not only for pros who are already testing Mojave, but also for those who are still in the High Sierra. In other words, I can now take advantage of some of the news that I saw on the Mojave Safari, months before its official launch; Of course, remember, this is a beta version and, as such, it may have bugs.
Apple has published a page with all the details of what to see again in Safari 12, also including a new 3D model viewer in AR, news in CSS, the privacy / security features commented on the WWDC18 keynote, plus tools for the Web Inspector , the definitive removal of support for NPAPI plugins, among others.
I don't intend to install the macOS Mojave beta (at least not yet), but this Safari I will test, yes. ?