WebKit features for Safari 26.6

2026-07-28

Safari Web Inspector Timelines view with Layout & Rendering, JavaScript & Events, CPU, and Memory graphs, overlaid by the Safari icon and the headline “WebKit Features for Safari 26.6”.

Jen Simmons covers a small but focused update: a new compileOptions parameter lets you use JS String Builtins with WebAssembly.compileStreaming() and instantiateStreaming() without falling back to non-streaming compilation. Plus eight bug fixes across CSS, networking, service workers, web extensions, and WebRTC.

webkit.org/blog/18178/webkit-features-for-safari-26-6

Tags browser safari

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