Chrome 125 Adds Wasm GC, CSS Nesting Support

Chrome 125 Official Release

• Google rolls out Chrome version 125 to stable channels across desktop and Android.

• Focuses on developer tools, performance, and standard compliance.

WebAssembly GC (Garbage Collection)

• Introduces experimental support for Wasm-GC, allowing higher-level languages (like Kotlin or Dart) to compile more efficiently to WebAssembly.

• Reduces memory leaks and runtime memory use.

Expanded CSS Nesting Support

• Chrome 125 adds native support for CSS nesting, following the latest CSS Working Group specifications.

• Developers can now write nested rules without preprocessors like Sass.

Improved Web APIs

• Introduces enhancements to APIs such as WebCodecs, File System Access, and WebTransport.

• Enables more powerful browser-native app capabilities.

Viewport Size Adjustments

• Adjusts handling of 100vh to account for mobile UI elements more reliably.

• Fixes layout shifts when address bars show/hide.

Private State Tokens

• Enables the Private State Tokens API to reduce spam and fraud while maintaining user privacy.

• Helps identify legitimate users without fingerprinting.

Developer Tools Upgrades

• Chrome DevTools now support instrumentation of WebAssembly, better source maps, and new CSS inspection tools.

• Debugging performance significantly improved.

Accessibility Enhancements

• Improves screen reader compatibility and ARIA role compliance.

• Focus indicators and semantic labeling receive refinement.

Origin Trials

• Starts new origin trials for features like Storage Buckets, URLPattern, and WebSocketStream.

• Developers can opt-in to test experimental features in production.

Security Fixes