The Servo project has proudly announced the release of Servo 0.0.4, the latest in its series of monthly updates for the open-source, Rust-based web browser engine. This release marks a significant milestone as it introduces support for multiple windows, fulfilling a long-awaited feature for users seeking enhanced multitasking capabilities within Servo.
In addition to multiple window support, this version also brings a host of new features and improvements. Users can now configure HTTP proxies, and the engine will utilize system root certificates by default for enhanced security. Performance-wise, there are several notable improvements, including better cache control with HTTP cache eviction and optimized selector matching, which lead to reduced reflow work—a step towards making Servo more efficient.
On the web platform side, Servo 0.0.4 expands its feature set with the inclusion of support for CSS contrast-color() and meta charset. Additionally, it has implemented more sophisticated cryptographic functionalities via the SubtleCrypto API, which now supports ChaCha20-Poly1305, RSA-OAEP, RSA-PSS, and ML-KEM algorithms.
Developers interacting with the embedding API will find new tools such as the SiteDataManager to handle localStorage and cookies, alongside a NetworkManager for comprehensive cache control. Moreover, the update addresses various technical issues, including crashes related to audio layout, the handling of custom elements, and undefined behavior in garbage collection.
Overall, the release of Servo 0.0.4 represents a robust enhancement to the browser engine’s capabilities, paving the way for improved user experiences and a more secure, efficient browsing environment.

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Servo 0.0.4 introduces multiple window support, HTTP proxy configuration, and system root certificates by default. Performance improvements include HTTP cache eviction and optimized selector matching. New web platform features include CSS contrast-color(), meta charset support, and expanded SubtleCrypto API with ChaCha20-Poly1305, RSA-OAEP, RSA-PSS, and ML-KEM algorithms. The embedding API gains SiteDataManager and NetworkManager for better data and cache control, plus various bug fixes for crashes and undefined behavior.

Servo 0.0.4 Release: A Leap Forward with Multiple Windows and Enhanced Features