# servo v0.0.5

- Product: servo (https://whatsnew.fyi/product/servo)
- Vendor: servo
- Date: 2026-02-28
- Version: v0.0.5
- Original notes: https://github.com/servo/servo/releases/tag/v0.0.5
- Permalink: https://whatsnew.fyi/product/servo/releases/v0.0.5

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **added** — Support for <link rel=preload>
- **added** — Support for <style blocking> and <link blocking>
- **added** — Support for <img align>
- **added** — Support for <select disabled>
- **added** — OGG files can now be played in <audio>
- **added** — Support for 'cursor-color' CSS property
- **added** — Support for 'content: <image>' on all elements
- **added** — Support for '::details-content' pseudo-element on <details>
- **added** — Support for ':open' pseudo-class on <details>
- **added** — Support for ':active' pseudo-class on <input type=button>
- **added** — Origin API
- **added** — MouseEvent.detail property
- **added** — Request.keepalive property
- **added** — Support for cyclic imports, import attributes, and JSON modules
- **added** — navigator.sendBeacon() is enabled by default
- **added** — Support for https_proxy, HTTPS_PROXY, and NO_PROXY environment variables
- **added** — ML-KEM, ML-DSA, and AES-OCB algorithms in WebCrypto API

##### v0.0.5

Servo 0.0.5 includes:

- **&lt;link rel=preload>** (@TimvdLippe, @jdm, #40059)
- **&lt;style blocking>** and **&lt;link blocking>** (@TimvdLippe, #42096)
- **&lt;img align>** (@mrobinson, #42220)
- **&lt;select disabled>** (@simonwuelker, #42036)
- **OGG files** can now be played in **&lt;audio>** (@jdm, #41789)
- **‘cursor-color’** (@mrobinson, #41976)
- **‘content: &lt;image>’** works on all elements (@andreubotella, #41480)
- **‘::details-content’** on &lt;details> (@lukewarlow, #42107)
- **‘:open’** on &lt;details> (@lukewarlow, #42195)
- **‘:active’** on &lt;input type=button> (@mrobinson, #42095)
- **[Origin](https://html.spec.whatwg.org/multipage/#the-origin-interface) API** (@WaterWhisperer, #41712)
- **[MouseEvent.detail](https://developer.mozilla.org/en-US/docs/Web/API/UIEvent/detail)** (@mrobinson, #41833)
- **[Request.keepalive](https://developer.mozilla.org/en-US/docs/Web/API/Request/keepalive)** (@TimvdLippe, @WaterWhisperer, #41457, #41811)
- **Cyclic imports**, **import attributes**, and **JSON modules** (@Gae24, #41779)
- **navigator.sendBeacon()** is enabled by default (@TimvdLippe, #41694)
- `https_proxy`, `HTTPS_PROXY`, and `NO_PROXY` (@Narfinger, #41689)
- **ML-KEM**, **ML-DSA**, and **AES-OCB** in **[Crypto](https://w3c.github.io/webcrypto/)** (@kkoyung, #41604, #41617, #41615, #41627, #41628, #41647, #41659, #41676, #41791, #41822, #41813, #41829)

See our [January blog post] for a curated overview of the changes in this release.

[January blog post]: https://servo.org/blog/2026/02/28/january-in-servo/

##### Trying out the Servo Tech demo

###### MacOS

The macOS releases are not signed yet, so you will need to follow the [troubleshooting guide] in order to run the Servo Tech Demo binary on your Mac. 

[troubleshooting guide]: https://servo.org/download/#troubleshooting

###### Linux 

If you see an error `loading shared libraries` when starting servo on Linux, please refer to the [troubleshooting guide].

###### HarmonyOS

Please note that the `servo-aarch64-linux-ohos.hap` attached here is signed for OpenHarmony, not HarmonyOS. 
For HarmonyOS self-signing is currently required - You can download the `servo-aarch64-linux-ohos.so` shared library and use DevEco Studio to follow the instructions in the ArkTS [Servo Demo repository](https://github.com/jschwe/ServoDemo)


##### What's Changed

Please check out our [January blog post] to get a curated overview over the recent changes.

<details>
  <summary>Generated Release notes</summary>

<!-- Release notes generated using configuration in .github/release.yml at release/v0.0.5 -->

* ohos CI: Add a proper name for scenario test screenshot artifacts by @yezhizhen in https://github.com/servo/servo/pull/41614
* script: Implement generate key operation of ML-KEM by @kkoyung in https://github.com/servo/servo/pull/41615
* script: Implement WebCrypto encapsulation and decapsulation with ML-KEM by @kkoyung in https://github.com/servo/servo/pull/41617
* Refactor allow to expect by @waynevanson in https://github.com/servo/servo/pull/41586
* layout: Stop splitting inline boxes when they contain block-levels by @Loirooriol in https://github.com/servo/servo/pull/41492
* deps: Bump wayland-related together by @yezhizhen in https://github.com/servo/servo/pull/41621
* script: Fix `alg` field of exported ML-KEM key in JWK format by @kkoyung in https://github.com/servo/servo/pull/41627
* script: Implement import key operations of ML-DSA by @kkoyung in https://github.com/servo/servo/pull/41628
* Replace NetworkError::Internal with structured enum variants for calls with literal strings by @uthmaniv in https://github.com/servo/servo/pull/36599
* layout: Fix size of anonymous not marked as depending on block constraints by @Loirooriol in https://github.com/servo/servo/pull/41632
* layout: Handle block-in-inline dependency on block constraints by @Loirooriol in https://github.com/servo/servo/pull/41624

_[Truncated at 4000 characters — full notes: https://github.com/servo/servo/releases/tag/v0.0.5]_