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Ladybird Marches Forward with New Sponsors, PDF Viewer, and GTK4 Frontend

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Ladybird pulled 333 pull requests from 35 contributors this month, welcoming seven first‑time contributors and securing new backers. The Human Rights Foundation joined through its “AI for Individual Rights” program, contributing $50,000, while individual donor Jakub Stęplowski added $1,000.

The team rolled out an inline PDF viewer powered by pdf.js, adding full navigation, text selection, and zoom. Profiling the Intel ISA Manual triggered optimizations in the typed‑array cache and CSS :has() invalidation, tightening rendering performance.

Browser‑side changes include speculative and incremental HTML parsing, off‑thread JavaScript bytecode generation, and independent rasterization for each navigable. These shifts move 200 ms of main‑thread work off‑screen and reduce duplicate fetches, improving page load times on heavy sites like YouTube.

On the UI side, Ladybird introduced a GTK4/libadwaita frontend, mirroring GNOME Web’s design language. New bookmark management, drag‑and‑drop, and CSS image‑set support round out a feature‑rich release that also boosts Speedometer scores from 67.7 to 73.6.