Apple Releases Safari Technology Preview 256

Apple has released Safari Technology Preview 256, focusing on platform stability and standards compliance.

Key Updates:

• Core Engine: Improvements to CSS, JavaScript, and Rendering.
• Web APIs: Updates to Web API, WebGL, and WebRTC implementations.
• Developer Tools: Fixes for Web Inspector and Web Extensions.
• Compatibility: Now available for macOS Tahoe and macOS Golden Gate.

This release aims to gather feedback on upcoming web features. It runs side-by-side with the production Safari browser and does not require a developer account.

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Source: https://www.macrumors.com/2026/11/04/apple-releases-safari-technology-preview-256/