Apple started trying new Safari features including support for HEIC, Live Text and some other features coming in macOS Sonoma later this year.
WebKit Blog: Release Notes for Safari Technology Preview 173
Apple Developer: Safari – Resources
- Apple Releases Safari Technology Preview 173 With Safari 17 Features
- Safari Technology Preview updated with features coming to macOS Sonoma
Developer:Try Safari Technology Preview, check web content behavior, check compatibility.
QA engineer:Check web content for regressions.
PM/DM:Business as usual.