Apple has released Safari Technology Preview 92 for macOS Mojave and the macOS Catalina beta

Safari Technology Preview Release 92 is now available for download for macOS Mojave and the macOS Catalina beta. If you already have Safari Technology Preview installed, you can update in the Software Update pane of System Preferences on macOS.

This release covers WebKit revisions 249190-249750.

JavaScript
Fixed Math.round() which produced a wrong result for value prior to 0.5 (r249597)
Made Promise implementation faster (r249509)

WebGPU
Fixed matrices to have correct alignment (r249214)
Implemented GPUUncapturedErrorEvent (r249539)
Implemented SampleLevel(), SampleBias(), and SampleGrad() in WSL (r249453)
Updated several interface and enum names to match specifications (r249601)

  Safari Technology Preview 92 released