The Ladybird browser project's February 2026 update covers several major developments. The headline item is adopting Rust as a second language alongside C++, replacing an earlier failed attempt with Swift. The JavaScript compiler front-end (lexer, parser, AST, scope analysis, bytecode compilation) has been ported to ~25,000 lines of Rust using AI coding agents (Claude Code and OpenAI Codex), verified against 53,000+ tests with zero regressions. Key improvements include text editing features (double/triple-click drag selection, autoscroll, scrollable input fields, blinking caret, CSS ::selection), significant performance work for Reddit, YouTube, Discord, X.com, and Cloudflare (SVG partial relayout, animated image sliding window decoding, cookie versioning to reduce IPC, mask compositing via Skia), and new CSS/SVG features like scroll timelines, counter styles, and the pattern element. YouTube video playback now works at 360p, and right-click image saving was added. The project is trending toward an alpha release later in 2026.
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