Ladybird Browser Adds PDF Viewer, History Features in April

The Ladybird browser project reported significant progress in April, merging 333 pull requests from 35 contributors including 7 first-time contributors. Key new features include an inline PDF viewer using pdf.js that supports navigation, text selection, zoom, and search. The browser now has browsing history with rich address bar autocomplete showing previously visited pages with favicons and titles, backed by SQLite storage. Technical improvements include speculative HTML parsing that scans ahead for resources when blocked by scripts, incremental HTML parsing that processes response bodies in chunks, and off-thread JavaScript compilation that moves roughly 200ms of main thread time to background threads. Each navigable frame now rasterizes independently on separate threads, preparing for future iframe sandboxing. The project welcomed new sponsors including Human Rights Foundation with $50,000 through their 'AI for Individual Rights' program.