• Home Blog New to the web platform in NovemberStay organized with collectionsSave and categorize content based on your preferences. • Discover some of the interesting features that have landed in stable and beta web browsers during November 2025. • Rachel AndrewGitHubLinkedInMastodonBlueskyHomepage Published: November 26, 2025 Published: November 26, 2025 Stable browser releases Firefox 145andSafari 26.1released to stable during November, this post takes a look at what that means for the web platform. • Safari 26.1 This release of Safari is mostly a release that fixes bugs and compatibility issues with existing features. • There’s a couple of additions with support for relative units in SVG, and support for remembering the last successfulposition-tryfallback in CSS anchor positioning to reduce layout jumps when styles change. • Atomics.waitAsync() Firefox 145 now supports theAtomics.waitAsync()static method.
Article Summaries:
- In November 2025, major web browsers rolled out new stable and beta releases that expand the platform’s feature set. Firefox 145 and Safari 26.1 entered stable, bringing bug fixes and small additions such as Safari’s support for relative units in SVG and improved CSS anchor positioning. Firefox 145 also added Atomics.waitAsync() for asynchronous thread synchronization, the ToggleEvent source property, and sub‑resource integrity headers for scripts. The beta releases-Firefox 146 and Safari 26.2-preview further changes: Firefox 146 introduces CSS contrast‑color(), the display‑p3‑linear color space, and the @scope at‑rule; Safari 26.2 adds CSS random(), field‑sizing, hidden=until‑found, and new button attributes. These updates signal a continued push toward richer, more reliable web APIs.
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