Wide Arithmetic is now in Phase 4 - #558
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This additionally documents the feature gates used by Chrome, Firefox, Safari, Node.js and Deno. Sources: - [Phase 4 vote at the August 2026 CG meeting](https://github.com/WebAssembly/meetings/blob/main/main/2026/CG-2026-08.md#wednesday-august-5) - Chrome, Node.js and Deno: [V8 feature gate definition](https://chromium.googlesource.com/v8/v8/+/HEAD/src/wasm/wasm-feature-flags.h) - Firefox: [preference definition](https://searchfox.org/firefox-main/source/modules/libpref/init/StaticPrefList.yaml) and [implementation bug](https://bugzilla.mozilla.org/show_bug.cgi?id=1949081) - Safari: [JavaScriptCore option definition](https://github.com/WebKit/WebKit/blob/main/Source/JavaScriptCore/runtime/OptionsList.h) and [implementation commit](https://commits.webkit.org/311366@main)
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This additionally documents the feature gates used by Chrome, Firefox, Safari, Node.js and Deno.
Sources:
Phase 4 vote at the August 2026 CG meeting
Chrome, Node.js and Deno: V8 feature gate definition
Firefox: preference definition and implementation bug
Safari: JavaScriptCore option definition and implementation commit