Discover some of the interesting features that have landed in stable and beta
web browsers during December 2024.
 Rachel Andrew Technical Writer [GitHub](https://github.com/rachelandrew) [LinkedIn](https://www.linkedin.com/in/rachelandrew) [Mastodon](https://front-end.social/@rachelandrew) [Bluesky](https://bsky.app/profile/rachelandrew.bsky.social) [Homepage](https://rachelandrew.co.uk)
Published: December 18, 2024
## Stable browser releases
In December 2024 the only browser to release a new stable version was Safari with [Safari 18.2](https://developer.apple.com/documentation/safari-release-notes/safari-18_2-release-notes). This
post looks at the new features added to the web platform.
> [!NOTE]
> **Note:** Browser compatibility data pulled from MDN is included in these posts and may not have been updated yet for very recent browser releases. The post will show the correct information as soon as it appears in the [browser-compat-data release](https://github.com/mdn/browser-compat-data/releases).
## Baseline Newly available features in Safari 18.2
This release helps round out [Baseline 2024](https://web.dev/baseline/2024.md.txt) with a handful of features becoming Newly available.
### Page setup with `@page`
The
[`@page`](https://developer.mozilla.org/docs/Web/CSS/@page) at-rule lets you dimensions and margins for content such as
printed documents, ebooks, or slides.
### The `ruby-align` and `ruby-position` CSS properties
The
[`ruby-align`](https://developer.mozilla.org/docs/Web/CSS/ruby-align) and
[`ruby-position`](https://developer.mozilla.org/docs/Web/CSS/ruby-position) properties let you control how
ruby text is positioned and aligned within its container.
Learn more in
[Line-breakable `` and CSS `ruby-align` property](https://developer.chrome.com/blog/line-breakable-ruby).
### Style scrollbars
With the CSS
[`scrollbar-gutter`](https://developer.mozilla.org/docs/Web/CSS/scrollbar-gutter) and
[`scrollbar-width`](https://developer.mozilla.org/docs/Web/CSS/scrollbar-width) properties now
Baseline Newly available, you can
customize the appearance of scrollbars in your web app.
### `::target-text` pseudo-element
The [`::target-text`](https://developer.mozilla.org/docs/Web/CSS/::target-text)
pseudo-element lets you style text highlighted by a
URL text fragment. You can now choose how to highlight the text to better
draw attention to it.
### WebAssembly garbage collection and tail call optimization
Safari 18.2 includes support for these WebAssembly (Wasm) features,
bringing them to Baseline Newly available.
You can learn more about WebAssembly garbage collection in
[WebAssembly Garbage Collection (WasmGC) now enabled by default in Chrome](https://developer.chrome.com/blog/wasmgc),
and read about why
[Google Sheets ported its calculation worker from JavaScript to WasmGC](https://web.dev/case-studies/google-sheets-wasmgc.md.txt).
## Cross-document view transitions
Safari 18.2 includes support for cross-document view transitions,
along with view transition classes and types, and support for the
`pageswap` and `pagereveal` events.
Browser Support
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[Source](https://developer.mozilla.org/docs/Web/API/PageRevealEvent)
## `Uint8Array` methods
Safari 18.2 also includes the new `Uint8Array` methods to ease conversions
between `base64-` and hex-encoded strings and byte arrays:
- `Uint8Array.fromBase64()` and `Uint8Array.fromHex()`
- `Uint8Array.prototype.setFromBase64()` and `Uint8Array.prototype.setFromHex()`
- `Uint8Array.prototype.toBase64()` and `Uint8Array.prototype.toHex()`
Browser Support
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[Source](https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Uint8Array/fromBase64)
## Beta browser releases
This month we don't have new features in beta to announce,
due to the end of year.
The
[Safari 18.3](https://developer.apple.com/documentation/safari-release-notes/safari-18_3-release-notes)
beta is currently bug fixes, and
[Firefox 134](https://developer.mozilla.org/docs/Mozilla/Firefox/Releases/134),
and
[Chrome 132](https://developer.chrome.com/blog/chrome-132-beta)
are still ongoing from [last month](https://web.dev/blog/web-platform-11-2024.md.txt#beta_browser_releases).
We'll be back next year to let you know what's landing on the web platform in
January 2025!